I agree, Catman - tips are for SERVICE, and there are times when staff almost deserve negative tips. One of my pet peeves is when tips are included in the bill - tips should be discretionary, & unless you have a large party, there is no reason to include a 'service charge'. I have been known to cross these items off the bill when the service has been appalling - and I agree with giving massive tips for great service: this morning's brunch (Ryles, in Cambridge, MA) was one example when a tip of over 20% was more than justified...