Most restaurants add 10 % gratuity, which will be included in your bill. Although, if you are served well you can give the waiter an extra tip, they will be happy about it. In small restaurants the costumer decides. Taxi drivers do not expect tips, but often they try to increase their incomes by putting the prices higher than what it says on the taximeter. Guardians and porters receive US$ 1 for each piece of luggage. For drivers it is usual to give US$ 1 to 1,50 per each day, per person. For local guides US$ 3.