AOG
You wrote:
//Do you know I have been in many drinking establishments during my long life, but I have yet to see two heterosexuals kissing each other in any of them.//
Really?
Not a kiss goodbye?
Not once?
I find that a little difficult to believe, but if that's your experience, I will accept it.
My point is that one of the functions of a gay-friendly bar is that young people can go out and chat up someone of the same sex, and due to the demographics of the bar in question, can be sure that they are barking up the right tree.
In straight bars, not only may the tree be wrong, but the you're likely to be in the wrong forest as well.