I remember flying into Germany in '06 and being able to light up anywhere in the airport, went back in '13 or '14 and they had little booths.

Wiiiide variety over Europe. You gotta specify

Depends where, and sometimes it varies wildly in the same country.

Hamburg, I didn't see a single smoker. Berlin, fucking rife with them

Not just US. A few years back japan banned it in restaurants (but not bars) and public buildings unless there's an actual smoking room in them.

Continental Europe maybe but as a Briton it's pretty shit to be a smoker here. Extremely expensive unless you go black market, you have to stand outside in the pissing rain in virtually all cases, and people can be very judging about it.

Source: ex smoker