I was thinking about doomed the club was. If it wasn't vampires, it would have been the KKK. If not the KKK, than it would have been the gangsters in Chicago the twins got the liquor from. It works as a horror story or a crime story or a drama or even as a diegetic musical.
It's the kind of movie that makes you want to talk about it when it's over and watch again. There are so many layers with the characters and the attention to historical details.