Tipping, even when you are already paying for a service

Tipping is a normal phenomenon in the United States. One gives tips when eating in a restaurant, taking a taxi or having a bellboy carry your luggage to your room. Tipping is usually 15 percent of the amount you spend on your entire bill, but it differs according to the quality of the restaurant or cab ride. Refusing to tip is impolite and will make you an unwelcome guest.