me: "How much for the large 20oz beer?
him: "$5.50
me - Ok, sounds good as I hand him my $10 bill
him: comes back with $3.50 in change and a bill that says $6.50 beer
It clearly wasn't this bartender clowns first time slinging a large beer, so what gives. After the "confrontation" he admits his "mistake" and says sorry. The food did look good, so likely to return on a less crowded night than Saturday. At least his mistake saved me from tipping him.