If they want my money they can give me good service.
I don't believe in giving money for nothing.
Adequate means they took my order and brought my food, that's all.
And as for being cheap, I have been known, for outstanding service, to give a 40% tip on a bill of hundreds of dollars. So pi$$ off.
Not sure how you square that against your original comment on the matter: "If the service is great they get a 20% tip."
I think I'll stand by my original comments.