A while back, I had occasion to re-visit Alabama to see friends and family. At that time in Alabama, bars and pubs are free to choose whether or not they prohibited indoor smoking. (I've no idea what current regulations are regarding the same.)
In bars that permitted indoor smoking, the atmosphere was a horrible eye irritant. My clothing reeked for a week, or until I washed it -whichever came first-.
Back in my college days, I didn't see what the big deal was. Then, I moved out to a place that prohibited smoking in indoor public places. It took that change of perspective to understand how much nicer I find an environment that is not saturated in tobacco smoke.
YMMV, of course, but I expect that I'm far from the only one who holds this opinion.