Stiring Folk Club, in Scotland, one of the best, went non-smoking, two years ago. Despite the proposer thinking, prior to the AGM, that she had a battle on her hands, the motion was passed with no-one against. There has been no problems with attendences, the club goes from strength to strengh, (good committee).
One point I recall being made during the pre vote debate was that many artists include a "no-smoking clause" in their contracts these days.
On a personal note as a non-smoker, my pet hate is openng my guitar case at home a couple of days after playing a smoky venue.
Iain MacIntosh, Scottish folk singer of renown and non-smoker, is only recenly back on the road after a serious chest illness, brought about by many years of travelling in cars etc with Hamish Imlach and other heavy smokers.
love, john.