I don't like PDA's either but if you're in public you just have to accept that you might see people do things like that, unless what they're doing is OTT sexually or illegal or anything you don't have the right to dictate how other people in public places should behave even if you don't like what they're doing. So that plus the whole 'you can only be gay in the evening when the straights aren't here' thing
the manager of the bar/restaurant was totally out of order imo. I wonder though if he did anything wrong legally? From the sounds of it he didn't throw them out or refuse service? So it'd be interesting to know what happens with the legal action.