I'm just a lousy Australasian, so don't have any place in a bar

but in NZ the smoking ban seems to have caused little stress.
The venue owners I have heard from who are finding it shit are not those who are running clubs for fringe dwelling extremists or something, but rather those who have old pubs where a middle aged drinking crowd have always met in the late afternoon to get pissed, smoke some ciggies and have a chat. Anyone under 40 doesn't seem to have got fucked off about it.
The big change I noticed is that you can smell a lot more, so if you're standing in a room full of predominantly men talking shit and drinking beer, you know all about it. Likewise if you're surrounded by people dancing near you, particularly anyone with their arms above their head, you know about that too.
I dunno, I've never been a smoker, so maybe I'm missing out on the culture nuances. I do find it funny that many of the same people who rave about the health benefits of it are the same who bitch about health being a lousy argument for the illegality of any other drug. I guess it's not making a substance illegal though; it's not supposed to be protecting the health of the user, but those around them.