In my recollection, in the US, 30 years ago restaurants had "smoking" and "non-smoking" sections. And non-smokers sometimes complained bitterly about smoke wafting into the "non-smoking" section. Which in fact led to some restaurants being all non-smoking before government intervention. The NY statewide ban on smoking in workplaces was only passed 15 years ago.
I don't know about bars 30 years ago, though. Because drinking has always been considered a "vice", I think people tended to group it with smoking and think if you're going to tolerate one, why not the other.
Smoking bans in restaurants and bars have made a significant difference in most states.
If I remember correctly, we had a non-binding agreement between the health ministry and our national restaurant and hotel organisation at first, but this did not change much.
Even most smokers I know agree that the laws were necessary, and that they are thankful for them because otherwise they would not go outside to smoke.
Facebook’s reckless use of private data is a public hazard not unlike passive smoking. It’s not going to be solved by an asymmetric fake free market where customers are free to choose an option that doesn’t exist.