Man, no offense, but you guys freak out, me thinks. I mean, I live in an apartment building and I used to smoke in the shower all the time before school. I used a bowl and I was take a hit, and cover up the bowl with the lighter or my hand (which didn't hurt because it was wet, haha) and then hold it in for as long as you can. Then blow down directly into the streaming water. If you do it right, a lot of the smoke doesn't rise and if a little does it usually goes directly into the fan.

What I would do is lather up your hair with conditioner and leave it in there, and then right as soon as you're about to get out, THEN wash it out.

If you want to, go ahead and say what that guy said and apply cologne and deoderant before you get out of the room. But I honestly don't believe there will be much of a problem.