15% is OUT and 20% tip or more is IN!!
Bartenders: A dollar a drink unless the drink is expensive you should tip $2 a drink.
Waiters: 20% tip or more especially if they are good.
Picking Up a To-Go Order. If there's a tip line on the credit card receipt, and all the person at the register did was package up your food, 10% is enough.
Valets. At least two dollars, but three if you really like your car.
So you better be a good tipper! Or I will come find you ;)