We have flavored teas at my restaurant; they're all the rage now, after all. We have two types of raspberry tea: the pre-mixed kind that comes out of the soda fountain, or fresh brewed tea mixed with a syrup. The second kind costs about twenty cents more, but I get a sales point for it (and they're still all up our asses about that). So I always give people the option, knowing most people will choose the freshly brewed tea.
So when the father at my table of four asked for raspberry tea, I gave him the two options. He stared at me for the moment, then told me as if I were stupid, “whichever costs less.”
His children ordered steaks, and they had some salads. As soon I finished ringing up their sixty dollar order, I knew he wasn't going to be happy with the total, and that I would suffer for his family's extravagance. My only bad tip of the night: $5 on $61. Screw you, cheapass. If you can't afford to take your whole family out for dinner, then DON'T.