As someone who suffers asthma I tend to be very aware of where people smoke as it restricts where I can go. In the UK most public transport is supposed to be non-smoking, although some people appear to believe that the rules don't include them. Most pubs and bars are very smoky, some places have high ceilings and good extraction systems but most don't, the idea of a non smoking area is good in theory but even where they are identified, because they are still part of a room which contains smokers the idea of a non smoking area is purely theoretical. The same can be said for most restaraunts although a few here and there are big enough to have non smoking areas that are far enough removed from the smoking areas that they do work. Most public buildings such as council offices and libraries are non smoking, as are the areas of cinemas where the films are actually shown (but often not the lobby or cafeteria areas). Please note I am not a health nazi it is simply that being exposed to smoke tends to trigger a severe asthma attack where I am struggling to breathe and it's often still affecting me days later. The jury may be out as far as some people are concerned about the effects of secondary smoking - I know it's immediate and very obvious effects on my personal health.