Surely you should avoid smoky places if it has that effect on you, Sooz? It sounds pretty masochistic putting yourself through that. Surely if people just exercised choice, and took their custom to places where they were comfortable, the situation would sort itself out. Money talks.
   Any pub which sets up a non-smoking general policy, with some decent smoking-permitted areas which are comfortable(and sheltered if outside), will do fine business. All you have to is make your feelings clear to management. The situation will change itself. We dont need prohibition and being nasty to each other.
   Smoking's the easy one. How we tackle the serious pollution problems?