>> there has to be rule educate me on this. is there ever appropriate time to give a 10% tip or always 20% standard even if the service is bad maybe they have a bad day. do you still give them 20%? 20 is easier thing right a $50 tab for example just multiply by 2 and you're home $50 means 10 dollar tip but yeah, restaurants have struggled so badly particularly during koafdz and after somebody closed, so even if everything wasn't perfect in your mind and we're a spoiled society let's face it. leave the 20% make it easy. help these people, even if you think it wasn't very good. as a waiter i'm biased but that's the way it went for me anyway. lawrence: was this a great parenting moment guide your kid and also giving them public embarrassment as well? >> yeah i think you learn by doing and i teach my kids 9 and