My thread on Dirty Dancing made me think. Specifically, about the following movies:
Footloose
Flashdance
Grease
Saturday Night Fever
These movies all had hit soundtracks or theme songs, lots of dancing, a star who was/became a sex symbol. Do they represent their own genre? Which among them is worth remembering 20 years from now? Are there any recent movies in the same vein? (Chicago doesn’t count; it’s an adapted Broadway musical)
The genre is…wait for it…musical.
“Grease,” BTW, was a stage musical before it was a movie.
It was a phenomenon called “box office success.” You will see it’s effects when a sci-fi movie does well, or a serious drama, or a role-reversal comedy.
One does well, and a whole crop of them are sure to follow. Why be original when the other guy already was?
Nah. Not a single person in all the movies except “Grease” sings.
What about the high school movie craze? Or the gen-x working a crappy job movie craze? A few popular movies doesn’t make a genre or a craze, they’re just sort of about a similar theme. IMHO they’re a subgenre at best, and since they’re already fondly remembered 20 years later, I can’t imagine the people who love them now forsaking them 20 more years from now. Most of them (save Dirty Dancing) should be forgotten, but… 
Anyway
Save the Last Dance probably fits your criteria. Lots of dancing, a young starlet that is becoming a sex symbol…