I think if you are male, you can tip based on the attractiveness of the server.
Appearance maybe, but not attractiveness is my philosophy.
I find the tip function on debit/credit machines overly suggestive, especially at nontraditional tipping locations or socially optional tipping locations. Sometimes I'm wary about tipping because they may think I'm hitting on them, but then sometimes I don't and I get a dirty look. Trying and pick somebody up with the tip just seems wrong?
Edited by todd, 26 April 2016 - 10:44 AM.