There has been a smoking ban here in Ontario for a few years now. It has affected the gambling community, you can literally see the difference in the amount of cars, especially on weekdays. It has, however, made me a much happy gambler
I don't mind if people smoke, I don't even care if they smoke around me, but it REALLY, REALLLLLLLY bothers me when some stranger sits down beside me and begins to blow smoke in my face. It's all about having respect! I respect you smoke, respect that I don't!
Little off topic rant there, lol... but I can assure you, it will affect land based halls a bit at least. The real die-hards will still go, but many others probably will turn to online gaming.