A group of seven college-age kids came in the other night; they're friends of one of the hostesses. She always puts them in the section of a server she likes because she thinks they're fun. Unfortunately, the other night that was me.
They ran my ass off for an hour, made constant just-kidding-but-not-really jokes about getting things free, sent back a steak claiming there was a hair on it, and spilled drinks all over torn up napkins and thrown food scraps while they ran up a $72.43 bill. They left $73. Then a couple of them sat at the bar to drink, and tried to wheedle the bartender in to serving them after close.
Since she's served them before and knows they don't tip the bar either, they didn't get any beer.