It depends, I to be honest,do not like too, and here's why. Servers don't work that hard, they take your order, then give you food, was it worth the tip? Probably not. If people won't tip people at the gas station, or ANY service, why tip a server? I know that server wouldn't tip someone at the gas station, therefore I don't believe they deserve one.

Always tip, or never. It has nothing to do with being cheap, but being fair.