This could be a longer film, to be honest. The plot is okay, it could be something bigger, however, when trying to recreate events in a period of time that was not even that long ago, one should research a bit more about the subject they want to portray to avoid flagrant anachronism.
There was no "disco fever" as early as 1973! Disco music was in its infancy that year. Disco was still a underground phenomenon with mostly funk and soul music, and there were no clubs like Studio 54 (the obvious inspiration for the one where the story is set in), with people making huge lines, and there was no "dance competitions" and "three-piece suits" that were clearly inspired by Saturday Night Fever, a movie that would only see its release in December 1977. The hairstyles, fashion and music don't match 1973 either.
If the story took place in 1978, in the actual height of the disco crazy, it would be spot on!