If you are uncomfortable bringing up pipe tobacco to them don't.
Bring up the regulations in general. Comment of cigars, ecigs, snus, roll your own, snuff, chew, or any other 'other tobacco products' you can come up with.
We've sit in the corner because it's the other guy long enough. We have guys that literally have to drive outside city limits to lawfully enjoy a pipe. We have guys that can not lawfully mail order tobaccos or even lawfully participate in bombings and box passes. Light your pipe up within 20 ft of a door with that little crossed over cigarette and see if anyone cares that you have a pipe instead of a cigarette. M
Or sit on your butt and complain about taxation, limited smoking areas, and other insanity nanny statism. Whatever.