Bitter Waitress has a database of names and locations of restaurant patrons who left lousy tips, along with comments.
Where it happened: Franklin, TN
Total bill / Tip amount / Percentage: $75.76 / $4.24 / 5%
What happened: Barely squeezing into their chairs, they immediately whip out their two free appetizer coupons and proceed to order the largest appetizers possible. They then order the largest portions on the menu, request numerous favors and have me box up the last little scraps that they can't cram down their gullets into 6 separate containers. Then with a patronizing tone they tell me that I can keep the change.