You guys rock.
1. He magically gets the cops to dance to a Latin beat.
The Mask
Solved by Evn (comment #1) and Roberta (comment #3).
2. A tango at a charity ball, featuring the hero and the villain’s girlfriend.
Never Say Never Again
Solved by MJ Ray (comment #13).
3. He’s supposed to be performing a lovely ballroom dance, but he’s drunk; she covers for him and makes it look like a comedy dance routine.
Holiday Inn
Solved by Roberta (comment #3).
4. As soon as his parents are out of town, he dances alone to rock & roll.
Risky Business
Solved by Evn (comment #2) and Roberta (comment #3).
5. Her costume is stolen while she’s on break, and she becomes hysterical, but she must return to the dance in dirty clothes.
HINT: Although this movie revolves entirely around dance, and takes place entirely at a dance, it is not a musical.
They Shoot Horses, Don’t They?
Solved by Melville (comment #14).
6. The dairyman dances by himself in the barn while tending the animals.
Fiddler on the Roof
Solved by Ben (comment #10).
7. With garbage can lids on their feet.
It’s Always Fair Weather
Solved by Melville (comment #7).