[Maximal]

I start at 20% and depending on how attentive they are and how polite they are it goes up and down.

I do often leave a 1 cent tip because alot of wait staff seem to think that as long as the plate hits the table as they walk by, then they have done thier job.

I have also been know to tip 50%, but that is pretty rare and the wervice has to be really good
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and if it is a buffet then they only ever get a couple of dollars tip