The casino is the main entertainment facility of many Las Vegas hotels and offers a variety of gambling opportunities, from slots to table games. In addition, there are often restaurants, bars and other amenities on the property. The casino is open to guests 21 years of age and older.

Generally speaking, casinos have three types of games: gaming machines (like slot machines), table games, and random number games. Gaming machines are played by one player at a time and do not require the involvement of casino employees. Table games, such as blackjack and craps, involve a player against the house. These games are usually conducted by croupiers. Random number games, such as roulette and poker, use a random selection of numbers to determine the outcome of the game.

While most casino games offer a predictable long term advantage to the house, there are some that allow players to mitigate this edge through skillful play. These players are known as advantage players.

Casinos are found worldwide. In the United States there are over 40 states that allow some form of legalized casino gambling. The majority of these are in cities and towns with a large tourist population, such as Atlantic City, New Jersey; Las Vegas, Nevada; Reno, Nevada; and Chicago, Illinois. Several American Indian reservations also operate casinos. Other countries, such as Japan, have legalized casinos. The number of casinos is increasing as states relax their anti-gambling laws and permit the construction of more facilities.