If a tip is left for a waiter does it have to go to him?

* Every restaurant is different. Sometimes when you leave a tip the money from all waitress' or waiters are pooled and divided (bus boys may get some of the tip money as well.) With other waitress' and waiters they may be able to keep the tip for themselves. Generally you tip a waiter 15 percent if the service is good. If you don't feel within reason you have had good service you do not have to leave a tip.