Tipping for services is common throughout the United States. Although it is always up to the individual whether or not to leave a tip, there are five areas in which tipping is expected unless otherwise indicated.
Baggage: $1.00 per bag should be given to porters who carry luggage at airports, train stations and bus terminals.
Hotels: $1.00 to $5.00 is a sufficient tip for the bellboy or porter who handles your suitcase. Tip the doorman if you wish, in relation to the service he performs. It is also nice to leave a tip for the maid service when you check out of your room. A tip of 15% to 20% of the bill is acceptable for room service.
Restaurants: Tip 15% to 20% of the bill in a restaurant where you are served by a waitress or waiter. Ordinarily, no tips are required in a cafeteria (where people serve themselves), in fast food restaurants, or in snack bars.
Taxis: Tip 15% but no less than $.75 to $1.00 for a very short trip.
Hair Salons: Tip 15% to 20% of the bill.
You should never offer tips to police officers, government employees, or public officials. Hotel clerks, bus drivers, theater ushers, salespeople or flight attendants are also not tipped.
Again, tip at your discretion. If you feel the service was not good, do not be afraid to leave less than the amounts indicated above or no tip at all.