Actually I do always tip good serivce I've been a waitress barmaid kitchen staff it's a shirty job and I know been nice gets you far on both sides common deceny
People who talk down to customer service staff like waitress etc are just assholes IMHO I've worked for 6e an hour and I've worked for 200e and manners cost nothing
Then again I tell clients to go fuck themselves regularly
But always been nice to your waitress