As a Brit when in America I find it awful how the waitress will pretend to be friendly. If we're just a group of guys or whatever I don't want you to be pretended to be interested in who we are, what we do. Putting a hand on my back isn't going to make me prefer the food I'm here for. If I wanted someone to pretend to be my friend, I'd be in a titty bar.
I think there is a good middle ground, in the UK tips are expected to be about 12.5% max. All staff share them, and front of house aren't so transparent in trying to get a bigger tip from you. People appear to take pride in what they do, rather than just being mercenary.