It's funny that people continue to call The Frolic Room a "dive bar." I have to think anyone who says that has never been to The Frolic Room, or to a dive bar.
I'm not even sure it's possible to run a real dive bar anymore, what with the city inspections and letter grading and whatnot. If they close down taco stands for having cockroaches (which they do), they aren't going to let a really dirty bar stay open.
I think when most of the kids say "dive bar," they really just mean an old-timey bar like their dad or grandfather drank in.
But a real "dive" is a filthy shithole full of shady characters, isn't it? 30 or 40 years ago that probably described every bar in Hollywood. I think you'd be hard pressed to find one now though.