A casino (sometimes called a gambling house or a gaming room) is a facility for certain types of gambling. It is usually combined with hotels, restaurants, retail shops, and/or cruise ships. In modern usage, the term is most often used for establishments that feature table games like baccarat, blackjack, and roulette. In addition, some casinos host live entertainment events such as stand-up comedy and concerts.

Gambling in all its forms has been a part of human culture for millennia, with evidence dating back to 2300 BC China. In the modern world, casino gambling is a global industry with thousands of locations worldwide. The largest casinos in the world can accommodate up to 5,000 guests and offer everything from a variety of table and slot games to fine dining, luxurious rooms, and upscale shopping.

Most casinos operate on a profit-sharing basis with their patrons. This means that the casino accepts all bets within an established limit, and no patron will win more than the casino can afford to pay out. In addition, most casinos have a mathematical advantage over players, which can be expressed as the expected value of a bet or, more precisely, as the house edge.

The modern casino is increasingly incorporating technology to maximize revenue and minimize costs. For example, many casinos now use video cameras to monitor table actions, and a variety of electronic systems allow them to oversee bets minute by minute and quickly discover any statistical anomalies. This is in addition to more traditional security measures.