While traveling I've noticed more states where I don't have to request the "non-smoking" section in restaurants. For me, that's great. Inevitably as a non-smoker, I was the one stuck at the table that is right beside the smoking section. If I walked into a restaurant and saw great billowing clouds crawling across the room, I would leave. I've actually walked in and turned around and left before event talking to a soul because the smoke was so thick.
So in my little search for the effective date for Tennessee's new smoking ban, I found a nice list on Wikipedia of what states have bans and to what extent they cover. I thought it might be handy for anyone else traveling, so enjoy!