Unlike lotteries, casino gambling involves playing games of chance. There are several types of casino games, including card games, random number games, and dice games. Casinos also offer live entertainment.

The games of chance in a casino are managed by a croupier, who is also known as a dealer. These employees handle the large amounts of currency that are used in casinos.

In the United States, there are more than 1,000 casinos. These are mostly owned by corporations. The Las Vegas Valley has the largest concentration of casinos in the country. Some casinos specialize in inventing new games.

Casinos make money by taking a commission from each player. This is called rake. The rake is a small percentage of each pot. It is taken by the casino after every hand.

Casinos spend a lot of money on security. They have specialized security departments that work closely with guests. They usually are divided into a physical security force and a specialized surveillance department. The physical security force responds to calls for help and the specialized surveillance department operates the casino’s closed circuit television system.

Most casinos use bright wall coverings to create a stimulating effect. They also use bright floor coverings. This brightness is believed to help people lose track of time.

Casinos make a lot of money from high-stakes gamblers. These gamblers usually spend more than average. These people are offered perks such as free luxury suites and personal attention.