An addict of my acquaintance, at singing parties, says from time to time "Sorry, I have to go out for a breath of foul air".

Certainly, it is an improvement for me to be able to spend an evening in a bar without having to wash everything from the skin out afterward. However, I do not spend a lot of time in bars, and I sympathize with the people who do & are used to mixing the two vices. (There was a lovely cartoon that showed a customer asking a bartender for a light & being told "Sorry, you can't rot your lungs here anymore -- we only do livers.") Perhaps, in some kinds of establishments, a technological fix might be possible -- say, in a restaurant, an exhaust hood over each booth with a powerful fan activated by the first whiff of smoke.

Speaking of technological fixes, I read some time ago of a device that some have found helpful in quitting. It consists of a cigarette box with two buttons on it. Push the green button, and it will eject a cigarette in 10 minutes -- provided that you have not pushed the red button in the meantime. It seems that for some people, never being more than 10 minutes away from a smoke does the job.