Actually Miami Bayside is O.K.. Yes, it is a tourist place - you don't find natives there(1), however, most of the the venues have self service - and no tip at all!
They started to add tip; Europeans did not give a tip at all. It's not allowed to ad a tip (unless shown on the menue ... for more than 6 or so people..)
Last year a restaurant was in deep trouble ... they added a tip on the bill for an african american. He sued - discrimination - and won. Now most Miami restaurants don't add tip anymore - the bill comes with a small slip "asking" for a tip!