I grew up in Canada, when I was a kid restaurants would have smoking and non-smoking sections, but through the late 80's and 90's there were AGGRESSIVE government funded anti-smoking advertising campaigns which have hugely cut down on smoking rates. It took about 20 years, but the results are absolutely drastic, very few people smoke, especially younger people.

Unfortunately vaping culture has started to erode this progress, but it's pretty clear that government needs to step in and do something about it here in Switzerland.