This is a great article for restaurant patrons. Even as a waitress, I find the comment about not lowering a tip for bad service to 15% a bit entitled. Good, professional servers deserve to be paid, but why pay top dollar for shoddy, unprofessional service? I firmly believe that leaving no tip is a reflection on the patron and not the service.
But the article is about how to be a great restaurant patron. Great patrons tend to get great service because the waiters and waitresses are happy to serve them. Quid pro quo.
Best Restaurant Manners and Etiquette: How to be a Great Restaurant Customer and Get Good Service