A casino is a gambling establishment that features multiple games of chance and skill. It also may be known as a gaming house, gambling den, or simply a place to gamble. Casinos are usually built near or combined with hotels, resorts, or other tourist attractions and offer a variety of entertainment options to attract visitors. Most states have regulated casinos, but some do not. The United States is the world’s largest casino market, with the majority of its casinos located in Nevada and Atlantic City, New Jersey.

Many casinos feature a variety of games, from table games like blackjack and roulette to slot machines and video poker. Some casinos also have concerts, dining, clubs, pools and golf courses to appeal to a wide range of patrons.

The modern casino is a sophisticated facility that uses sophisticated security measures to prevent cheating and other crimes. Elaborate surveillance systems allow casinos to monitor every table, window and doorway in real time. Casinos also employ patterns of behavior to detect suspicious patrons. For example, a patron who places bets quickly and repeatedly, changes tables or is spotted glancing at his watch is likely to be watched more closely.

Despite their seamy reputation, casinos are legitimate businesses and often generate substantial profits. They are financed by the patronage of people who seek excitement and the potential for large winnings. The money that flows into Las Vegas is especially attractive to organized crime figures, who provide the capital for casino construction and operate the businesses with their own bankrolls.