I know you are probably LDS, and I know you are frugal. I know you don't want to overspend, and I know you want to "live within your means."
Great. But they way to do that is not by ordering lots and lots of food, and then refusing to tip.
It is especially rude when you not only refuse to tip for your meal, but then offer to pay for the two elders sitting accross the room, and don't tip on their meal either.
I don't get paid to look cute, people.