I've been getting used to non-smoking pubs recently, or at least ones where there's some effort to keep the air breathable.

The other day I walked into a pub at a London terminal which was full of smoke, and I just had to walk straight out.

Smoking in such a way that you get in the way of other people breathing is the same kind of freedom as driving at speed in a residential neighbourhood. A restriction on other people's enjoyment - and a threat to their life.