OK the bear wasn't the best example, but....

"What you do in the privacy of your own home, between consenting adults, is compleetly up to you"

Exactly my point! A bar is not a public place. It is a private place that the owner chooses to open to the public. He doesn't have to let anyone in. That's why I think it is absurd that someone who does not have the right to be there can protest about smoke! If you don't like the smoke then get out!