Unless my memory is really bad... There's sourleaf for chewing, Arbor Gold for drinking, but don't recall any character ever lighting a pipe. I can easily picture Tyrion and Bronn smoking pipes as they conspired. Bah just a minor detail but for such a gritty world I just thought smoking would be a part of it. Has George Martin ever said anything about this? Or does anyone have a theory as to why nobody smokes in Westeros?