I sometimes tip as much as 50%. Breakfast is generally a lower priced meal but the server usually makes more trips (coffee refills). Why don't they deserve as much as a dinner server? I also take into consideration clean up (did the kids make a big mess) and if it was a discounted meal (buy 1 get 1 free or kids free), I tip on what the normal price would be.
I'm usually a good tipper, but when I go to Grape Street I never tip anyone. I'm there for the bands, not to be bullied around by a bunch of linebackers in "security" tshirts.
Reg service 15% Better than average 20%