Yep, I was out in Glasgow last night. Clubs that don't have an outdoor area (evencarparks and loading bays have canopies at the moment) give out wristbands (or, bizarrely, playing cards...) so you can get back in, and they usually pen off a bit of the pavement in front of the club.
I can really see the ban working, there are definately far less smokers now, most people can't be bothered going out for a fag especially when it's raining. But it's really weird waking up after a night out not stinking of smoke. Good obviously, but weird!