First, smoke doesn't really bother me unless it's extremely heavy. I still bowl in a league and there are a lot of smokers.
BUT, my wife will no longer go to a bar to hear a band because of the smoke, so I don't go, either. We won't go to a restaurant that doesn't have a well segregated smoking section and she prefers smokeless ones.
Fortunately, most of the better restaurants here no longer allow smoking, although there's no city or state ordinance about it. The number of smoke-free restaurants is increasing rapidly, which tells me the policy isn't hurting business. A bar, however, might be a different matter.
Which is as it should be.
I don't care if an owner decides to make his business nonsmoking. That's their decision based on their clientele.
Where I get my back up is when the government TELLS the owner that they have to go nonsmoking based on junk science, lies, and demands from a handful of busybodies.