What a lovely post! Sure to attract well meaning replies about the risks of smoking, litigation, foul smelling flight decks, drug addicted pilots - fantastic!
I've never flown with anyone with the balls to light up in the flight deck,. In fact, I think I only know of 2 Capts who smoke.
I used to smoke, but for sensible reasons I gave it up - not an easy thing to do but it's going well so far - 6 months.
When I used to smoke in the car I was always worried about it smelling afterwards so I used to crack the window open - maybe the you should ask the capt to do that.
But seriously, it isn't going to be long before the smoking pilots will all have gone, or failed their medicals, so it might help your promotion prospects if they smoke. Go and buy them a packet of woodbines! You are experiencing a piece of history - a smelly one, and bad for you I admit - but it's something to tell your grandchildren about. You're probably damaging yourself worrying about it. Chill out.