In my opinion this thread fits better in the Lobby... so far.
It has been that way here for a couple of years, no smoking in businesses open to the public with 5 or more employees, no smoking in restaurants or public buildings. The loophole is that if a business is age restricted to 21 and over, smoking is allowed indoors. That is why AR isn't shaded in the link above.
It seems to be working fine.
http://news.bbc.co.uk/2/hi/health/7813124.stm