I'm with Bakechef; if it is a place where they bring you cocktails or anything else, I tip 10%. If it is all self-serve, completely, no tip. Buffets aren't my favorite anyway, so it doesn't come up often. One time my parents were visiting us in Williamsburg and we took them to a fancy buffet brunch. The waiters were supposed to keep the champagne flowing, water glasses, juice, etc. Our waiter never showed after his introduction. He was talking on the phone, horsing around and joking. Other wait staff took care of us. My husband was great! He flashed some bills and made sure our waiter saw it, then he proceeded to walk around the restaurant and personally tipped every waiter who had filled in for the guy who was supposed to be taking care of our table, and we left. I suspect he got the message!
