Exactly! I know if I am in around a few people I don't know I always ask if they care if I have a smoke. If they would rather I don't smoke around them, I go outside to smoke or something. Nonsmokers if you don't like it, speak up. It's not rocket science. Smokers aren't going to know you are "deathly allergic" to smoke if you don't speak up, especially if you are in a bar/club situation.