Tipping is not done or rare at best. It can even be insulting to tip, as though its an affront on the employee's salary. If you leave a few bills on the table after eating out, prepare to have the waiter run after you with your "forgotten" item. In America, tips are, in philosophy, meant to show appreciation for good service. Considering that many jobs such as waiters that are usually tipped get paid minimum wage or less, tipping has become a necessity.