I agree that poor service does not deserve monetary reward and service has to be pretty bad for me not to tip something but one time I did not leave a tip. The service was deplorable. Too much so to give details. I don’t know what the problem was with the wait person but I addressed it with the manager. I told the manager that I did not leave a tip and why. I said I did not know if this was her normal behavior, if she was sick, mad or whatever but he needed to address the situation with her or they would lose business over extremely poor service. There was nothing pleasant or cordial about the experience.