A casino is a gambling establishment where gamblers place bets on games of chance. Some casinos have a variety of table games, including poker and roulette, while others focus on slot machines. Some casinos also offer live entertainment, such as music or comedy performances.

In the United States, there are more than 1,000 casinos. Some of the largest are located in Las Vegas, Atlantic City, and New York City. Other casinos can be found on Native American reservations and in other countries around the world. Casinos are regulated by state and local laws, and many have security measures in place to prevent cheating or stealing by patrons. These measures may include surveillance cameras, security guards, and rules that require players to keep their hands visible at all times.

Casinos are often designed to be visually appealing, with opulent interior decor, lavish buffets, and top-billed entertainment shows. They also feature expensive hotel accommodations and shopping outlets. Some casinos have catwalks above the gaming floor that allow surveillance personnel to look directly down, through one-way glass, on activities at casino tables and slot machines.

Because of the large amounts of money involved, casinos are susceptible to cheating and robbery by patrons and employees. These incidents are relatively uncommon, however, and casinos employ several methods of security to deter them. For example, some casinos use specialized gaming mathematicians and computer programmers to analyze game results for irregularities. Other casinos hire third-party companies to conduct independent audits of their games.