I, thankfully, haven't met many gamers that smoke. Maybe three or four. Since I game with friends and we tend to have similar ideals (including a complete revulsion of smoke) this isn't too surprising.
Believe me when I say that I fully support anyone's right to smoke. I just prefer the smell of a hog confinement to cigarette smoke.
I have pretty severe dermatitis, which also impacts the sinuses. If I spend more than about a half-hour around contrated cigarette smoke, I'll have about the worst nosebleed you've ever seen. Sawdust will do the same thing.
It's safe to say that I'd not game in the situation you described, either.