The United States dollar, also referred to as the U.S. dollar or American dollar, is the official currency of the United States of America and its overseas territories. It is divided into 100 smaller units called cents.
The U.S. dollar is the currency most used in international transactions and is one of the world’s dominant reserve currencies. Several countries use it as their official currency,
Coins
Freq. used 1¢, 5¢, 10¢, 25¢
Rarely used 50¢, $1
Banknotes
Freq. used $1, $5, $10, $20, $50, $100
Rarely used $2, Not Circulated: $500, $1,000, $5,000, $10,000, $100,000
TIPPING
Restaurants with table service: Tip 15% of the bill, based on the quality of service. If you receive exceptional service, 15-25% is customary. In major cities of the U.S. however, 20% is considered to be a “good tip”. If you’re with a large party, be sure to check your bill just in case. 15% – 20% is often automatically charged for a large party (six or more).
Bartenders:$1 – $2 per drink, or 15-20% of the total bill.
Hotel housekeeping/maid service: $2-3 per night up to $5, more in high-end hotels.
Concierge: Tipping is never expected, but always appreciated.
In-suite dining waiter: Always read the bill, if there is a tip included, it will be on the bill breakdown. Ask the server. The policy of having the gratuity included in the bill is not the norm anymore. A service charge or convenience fee goes to the hotel, not the server. If there is no gratuity added, tip the server 15% – 20%.
Bellman/Porter: $1-2 per bag. More if the bags are very heavy.
Taxi Driver: 10-15% of fare, based on service.
Hotel limo driver: For a free ride from the airport, $10 – $20
Drink Server in a casino or bar: $1-$2 per drink.
Valet Parking Attendants: $2 – $5 (when picking up car).
Dealers at Table Games in the Casinos: 5% of bet amount at end of session, or occasional bet for dealer in amount of your normal wager-dealer can show you where to place bet.
Spa: For a massage or other treatment, 10% – 20%. Ask if the tip has been included, some spas will include a gratuity on your final bill. Most spas will provide you with an envelope to leave at the reception desk for the person who gave you your treatment.
Hairdresser/manicurist: 10% – 20%.
Showroom captains: $1-2 for the person who seats you, more if you asked for “special” seating – $20 for a requested booth or table, more for one up front.
Tour Guides: 15% – 20% + depending on quality (knowledge, friendliness, etc).