A casino, also known as a gaming establishment or gambling hall, is a building or room where people play games of chance for money or other prizes. The games played are usually slot machines, table games (like blackjack and roulette), and poker. Some casinos also have entertainment shows. To bet in a casino, you must be of legal age and follow the rules and regulations set by the establishment.

Most states have laws regulating the operations of casinos. The first casinos were run by Native American tribes, but they have since been joined by commercial operators and state-licensed gaming facilities. The United States has the highest concentration of casinos in the world. The city of Las Vegas is well known for its casino industry, and the state of Nevada is the largest revenue producer for the sector.

Although a small number of casinos are located in cities, most are in rural areas. Some are devoted to one game, such as bingo, while others offer a variety of games. Others focus on food, beverages, and entertainment.

Casinos rely on customer volume for profit, and they try to maximize customer satisfaction by providing incentives and rewards. During the 1970s, casinos in Las Vegas gave away free show tickets, discounted transportation, and cheap hotel rooms to encourage customers to gamble. More recently, casinos have become choosier and prefer to concentrate their investments on high rollers, whose bets can be in the tens of thousands of dollars.