Hi vtbf,
I went to
The Internet Movie Database (IMDb) after your first post. This is a wonderful source of information about movies. You can look up
key words like "dance studio" and other things. I looked those up as well as many others and could not find a film, from many results returned, that looked like the one you're describing. Can you tell us approximately if this is a new film, old one, really old one? You can look up your ideas on IMDB as well. Can you give us more detail? Like what city, etc.
Cheers, qw