You should know that in the United States, the service is not included and constitutes the remuneration of the waiter, the “tip” which is evaluated between 15 and 20% of the amount of the bill. If you pay by credit card, indicate in the box provided the amount of the tip you wish to leave and make the bill yourself. In bars, leave $1 per drink served. At the hotel, we usually give a tip to the porters, for a maid, we leave them on the table of the room when leaving. In cabs, it is customary to leave a 20% tip.