Depends on the country: they banned smoking indoors in Italy a while back, and at least in the part of the country I live in, people have always respected that ban (I was a bit surprised). In Austria, when we left, they still let people smoke anywhere and everywhere, pretty much - the only places where it was banned in Innsbruck, where we lived, were McDonalds and Ikea. My wife went out with our baby daughter for cake and coffee with a friend one afternoon, to a pastry shop, and came back reeking of smoke, because some other patrons sat down and started chain smoking. It made my blood boil.
That said, Vienna struck me as a very nice city - very livable for its size, although the climate leaves a lot to be desired.
That's a huge problem in Austria, coming here from Canada I was shocked that you could still smoke everywhere here. I rarely go out to bars or cafes here due to the fact that I then have to change clothes and shower in order to get rid of the smell of smoke.
That said, Vienna struck me as a very nice city - very livable for its size, although the climate leaves a lot to be desired.