A tip isn't optional
For those of you who don't tip:
When you go to a restaurant that has servers, you are, in effect, hiring the person who waits on you. You are expected to pay them directly in the form of a tip. The advantage of this system is that you can pay your server based on how well they did their job. Servers who do a bad job make less money, and vice versa.
If tipping wasn't expected, restaurants would have to pay the wait staff more, and this would be reflected in the price of the food. The servers would make the same money, but bad servers and good servers would all get paid the same, which means poorer service for you.
If you won't tip, then you should dine out only at establishments where tipping isn't expected (McDonald's, Subway, etc.). In America, a tip for a server isn't a little extra reward for unusually good service--it's the server's primary income.
I've been a manager at a bar/diner, and if someone stiffed a server, I would ask the customer if there was a problem with their meal. In a few cases, customers told me that they didn't believe in leaving a tip, and I told them that I didn't want their patronage. None of them returned, and I say good riddance.
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Be prepared!
3/3/14