After smoking in bars was banned, my brother and I noted how run-down and dreary the places we hung out looked. We just hadn't been able to see it before through the haze.
I always hated the smoke and the way your hair and clothes would still reek of it the next morning. Now, on the rare occasions I catch a whiff of cigarette smoke, it's nostalgic and almost smells good.
Many of us still love going to pubs. So much better not waking up reeking of second hand smoke. I went skiing in Austria a few years back and some of the places still allow smoking inside. I couldn't handle it, I can't believe I ever did.