It makes me a totally hypocrite (my poltics are generally against those kind of bans) but it made everything so much nicer that I couldn't help but like it.
They came for the smokers and I did nothing. Niemöller was totally right.
Though my immediate inclination on encountering same is to get out as quickly as possible. The experience is absolutely revolting.
IIRC, the country I'm in was the first to ban smoking indoors at venues. 2003 or so, I believe. I was a kid, so I didn't really notice it aside from the warning signs and the first time I went abroad.
The smoking bans I'm familiar with were phased in beginning in the 1990s, though specifics varied by locale (some cities and counties were earlier on the ban) and type of location (offices, restaurants, bars, etc.).
There are still 12 US states without comprehensive smoking bans, virtually all in the deep south: AL, AR, GA, KT, OK, SC, SD, TN, TX, VA, WV, WY. (SD and WY are the exceptions.)
Notably, the famed liberal strongholds of Missouri and Mississippi do have restaurant smoking bans.
Banning smokers actively made your life better - removing the behavior increased your enjoyment of the setting.