I smoke, and I know it's a nasty habit, and don't mind going outside to do it. Not a problem.
I don't like "sign up sheets", but I don't know of a better way to fix the "Mic Hog" thing.
I've only been to a couple of Open Mike things, and didn't like them.......trying to figure out why.

I guess it is the "organized" attitude......THIS person and ONLY THIS person (or group) gets to play.....I am used to everybody joining in if they know the tune/song, and chording/chopping if not..........I guess I don't like being in the audience at a "jam session".....does that make sense?