Get up to leave and say "Don't worry lads, I've got the tip." Then cash pay a weak tip based on your idea of the bill, but do not pay for your own meal and drinks. Scoot .away.
Mary said to Dave, " what's this 156 dollar charge?"
Dave says, "appears to be Pope's food and drink, but he got the tip."
Mary says: " He only paid the tip? Not his portion?"
Dave: "Yeah he pulled a Scottish Exit."