Q: When I go to a buffet-style restaurant where all the waiter does is take drink orders and clear plates, do I have to leave a tip?
A: At a buffet, a tip of ten percent of the bill is customary. But as with tipping in general, stick to the formula only if the waiter is attentive, appearing promptly when you need him. If he provides extra-good service, then you could tip him more. But feel free to give less if he neglects to refill your water glass or remove your dirt dishes or is missing in action when you’re ready for the check.