"But something happens when we slow dance."
—Keri Hilson, "Slow Dance"
So Alice and Bob, who either don't know each other very well, or are Just Friends, are attending some fancy party. For some reason, they wind up dancing to some slow romantic song that requires waltzing or some other dance typified by close body contact. Hey, that's ok, nothing special—except she's starting to blush, and he's getting all nervous. Could it be? Are they in love?
This often pops up during high school dances and fancy parties, the kind with hooped skirts and masks. For some reason, waltzing with a friend, or friend-of-a-friend, always winds up with one or both participants acquiring (or realizing) feelings of love towards the other, as though it were some kind of movement-driven truth/love spell. Often prefaced by an observation that She Cleans Up Nicely, and frequently occurs during a High School Dance, though it is by no means exclusive to teenagers.
A subtrope of Dances and Balls, obviously.
When adding examples, keep in mind that this trope is about the dance being the first indication of romance between the dancers, not just a romantic dance between two people who are in love (or in denial).
Anime and Manga
- Revolutionary Girl Utena: Utena and Anthy share an elegant ballroom dance after Utena improvises a gown out of a tablecloth when a cruel prank destroys Anthy's dress at a fancy-dress party.
- The Familiar of Zero: After catching Fouguet, the academy holds a ball where Louise asks Saito for a dance. In the novels, at least, Saito declares that that was the time when he fell in love with Louise.
- Yami no Matsuei: This trope is Hisoka and Tsubaki. The start of their doomed interaction consists pretty much of her bumping into him and then getting him to dance with her. Cue slow, romantic music, and Gaussian Girl effects as they stare into each other's eyes.
- The Magic World Ball chapters of Mahou Sensei Negima had two sets of these going, one straight, and one with several subversions. The straight one is Kotaro/Natsumi, and the oddball one being Negi/Asuna, because it isn't really Asuna, but her doppleganger Shiori.
- And then it's sliiiiightly played straighter, since by that point Shiori was already developing feelings for Negi.
- Subverted in Honoo no Alpen Rose, where Jeudi gets dolled up in a red gown to dance a waltz with the Romantic False Lead instead of the guy she has loved from childhood. Further subverted when said dance turns out to be plot-relevant, as it triggers the return on one of Jeudi's lost memories: dancing with a man who seems to be her father... before the plane crash that left her orphaned and amnesiac.
- Played a little straighter in the OP of the series, where she's seen dancing with both the False Lead and the Victorious Childhood Friend.
Film - Animated
- Beauty and the Beast is one of the most famous examples as they dance to "Beauty and The Beast".
- The Swan Princess at the end of the song "This Is My Idea".
- Tiana and Naveen in The Princess and the Frog; "If I can mince, you can dance."
- Anastasia: with Dimitri after her gives her a dress in the Waltz Reprise of "Learn to do it".
"I never should have let them dance..."
- Sleeping Beauty. Though Prince Phillip is drawn to Aurora by the sound of her voice, her first introduction to him is when he sneaks up behind her and starts waltzing with her to "Once Upon a Dream".
- Subverted in Tangled where Rapunzel and Flynn were trying to reach each other during the "Kingdom Dance" but don't come together until the song has ended.
- Nearly the whole of Cinderella's romance occurs as Prince Charming and the titular heroine dance to "So This Is Love".
- Rio. After dancing a samba duet, Blu and Jewel are on the verge of kissing... until the bad guys turn up.
Film - Live Action
- Sort of happens in The Sound of Music: Maria and Captain Von Trapp, when the kids ask to be shown the 'Laendler'. Whilst the audience (and the Baroness) can see this coming long before that, it's the first time either of the eventual couple give any inkling of noticing they love each other.
- This is the way Robert and Giselle both realize that they were meant to be with each other in Enchanted. It's also the only possible way they could justify Edward and Nancy, even though both of them were glaring at their respective partners the whole time.
- It looks like this is happening to Janis and Damien towards the end of Mean Girls, but thankfully the pair quickly think better of it.
- Played straight after Damien runs off. Kevin slips into Janis's still-open arms and starts dancing with her while asking about her ethnicity.
- Iron Man: Tony Stark first seemed to notice Pepper romantically when he got her out onto the dance floor for a nice slow waltz. They have an awkward and comedic conversation about it afterwards.
- Crumb and the old guy do this in The City of Lost Children.
- James Bond and Domino dancing a tango in Never Say Never Again. Does not quite cross over into Mating Dance territory, but one can see why Largo interrupts it at the first possible moment.
- Happens in Miss Pettigrew Lives for a Day:
Joe: I am making you uncomfortable?
- Played straight at the beginning of Mr. and Mrs. Smith when John and Jane dance in Colombia, and then subverted later on in the ballroom when they use the dancing to cover the fact they are removing each other's weapons.
- Arguably the entire plot of Dirty Dancing.
- In When Harry Met Sally... at the first New Year's party.
- There's a cute one in the 1987 film adaptation of Anne of Avonlea between Anne and Gilbert. It deeply affects Anne, who jerks away quickly after a few moments and makes an excuse to leave. Up until that point, she'd been oblivious to both Gilbert's feelings for her and her own feelings for him. She still remains oblivious to her feelings for him for a few more years.
- "Cheek To Cheek" from Top Hat.
- At the end of Elizabeth's first dance with Mr. Darcy in the Keira Knightley version of Pride and Prejudice, Mr. Darcy says that he hopes to afford Elizabeth more clarity of his character in the future. This must have been significant to Elizabeth because at that point everyone in the room disappears and Mr. Darcy is the only one she notices.
- In The Artist, when George and Peppy film the dancing scene for "A German Affair", they keep screwing up the takes because they can't stop staring at each other or making each other laugh. It culminates in a Held Gaze, after which a visibly unsettled George walks off the set. In the film's screenplay, this is actually pointed to as the precise moment where the two fall in love.
- Almasy and Katherine's dance in The English Patient film. It's romantic in that the mutual attraction between the two becomes apparent, but it is also extremely uncomfortable because of the sheer intensity of their connection coupled with the fact that Katherine is another man's wife. And he's sitting not far away.
- The live-action version of Disney's Beauty and the Beast replicates the famous ballroom scene surprisingly well.
- In Beastly, a modern retelling of Beauty and The Beast, Adrian teaches Lindy how to dance after he sees that She Cleans Up Nicely. It could also be the point where Lindy started falling for Adrian too, considering that she begins Letting Her Hair Down and wearing perfume around him after the dance.
- In Isabel Cooper's No Proper Lady, the sexual tension between Simon and Joan is unsurprisingly kick-started when Simon begins teaching Joan how to waltz.
- Cinderella, and just about everything based off her.
- Doc and Seven in the Star Trek: Voyager episode "Someone to Watch Over Me".
- Odo and Kira in the Star Trek: Deep Space Nine episode "His Way." Granted, Odo had already been in love with Kira for years by this point, but their dance seemed to be the turning point that allowed Kira to realize her own feelings.
- iCarly: Carly and Freddie in "iSpeed Date".
- Done twice in Nip and Tuck, first with Tuck and Thelma Possum at the harvest dance, then with Nip and Zelda Porcupine at the B-Movie cruise.
- In Battlestar Galactica, this happens in the episode "Colonial Day", for Lee and Kara (subverted in that there are already indications of mutual romantic feelings between them and Kara sleeps with someone else that night while fantasizing about Lee) and Roslin and Adama.
- In The Vampire Diaries episode "Miss Mystic Falls" 150+ year old vampire Damon Salvatore steps in to dance with his brother's human girlfriend, Elena Gilbert when Stefan fails to show up. You can see it in his eyes that this is the moment he realizes he loves her, and she appears somewhat affected as well.
- Also in The Vampire Diaries Stefan's dance with Elena's doppelganger, Katherine Pierce, is this as well, both in the past and in the present.
- In the Korean Drama The City Hall, Mi Rae and Ju Gook dance the tango at the Miss Baendaengi contest, finally letting the sparks fly.
- In the first episode of Bomb Girls Kate asks Betty to slow dance with her, very obviously setting up the beginning of their romance.
- Romeo and Juliet first meet at the Capulet's party, so some adaptations have them dance before they first speak to one another.
- West Side Story during the dance at the gym. Tony and Maria see each other for the first time and dance. It's a cha-cha, not a waltz, but it fits.
- Sweeney Todd: The Demon Barber of Fleet Street has an interesting variation. Mrs. Lovett is interested in Sweeney for the entire first half, but he's totally oblivious. Then come "A Little Priest", he notices her in a different light and they waltz. The catch? This sudden romantic interest is due to her...unsual idea of how to dispose of the body of the man he just killed.
- Miss Saigon is another atypical variation; Kim and Chris dance together, which seems to be the usual practice in the club before going off with a client, but there's only a hint of affection; they don't fall deeply in love until afterwards, and the scene that looks like a typical Dance of Romance is the reprise of the song they danced to when they first met.
- Final Fantasy VIII. The scene where Rinoa persuades Squall to dance with her is where you first know that they're the Official Couple.
- Well, y'know, besides the image on the cover.
- Elaine does this with Guybrush in Tales of Monkey Island Chapter 4: The Trial and Execution of Guybrush Threepwood, although it is parodied as a "Freaky Waltz of Attempted Rape".
- The dance party scene in Chicken Run includes one for the two leads (especially significant for the heroine.) Unlike most examples, it uses a fast-tempo song.
- Happens to Kick and Kendall in the episode "Dancing With the Enemy" on Kick Buttowski when they both share their first mutual hint of being attracted to one another (Kendall being the only one that sort of have hinted at it for a second or two previously)... however, the moment is broken thanks to an off-screen classmate who is apparently an on board shipper for this couple.
Kick: "You're so elegant..."
- Can be Truth in Television. Waltz songs are often romantic or ballad type songs, and having someone listen to that while having to concentrate on a dance partner can plant the idea that leads to romance.