across the bored. what is acceptable and good and where do you start to get offensive? >> i think 20% is the standered. i generally tip between 20 and 30%, depending on what or where i'm at. if it's an 18 check and not that out landish to leave 40 on the table. >> i do the same. i leave 20%. easy to calculate. and then if it's breakfast and the bill is very inexpensive, i leave more. >> yeah, it's got to be pretty spectacularly bad service for me to go below 20% and people should know the biggest sin is taking out on the floor staff or a waiter your unhappiness with the kitchen. so that's, don't do that. >> that said, when is the last time you got bad service? >> i don't get bad service anywhere and i'll tell you why. let me tell you why.