A casino is a facility for certain types of gambling. These establishments are often combined with hotels, restaurants, resorts, and retail shopping centers. Casinos also offer entertainment such as shows and live music. In addition to gaming tables, they usually have slot machines and racetracks. The precise origin of gambling is not known, but it has been practiced in many societies throughout history.

Modern casinos have evolved from their seedy beginnings and now cater to a well-heeled clientele that expects more than just blackjack or roulette. They provide a range of incentives to keep regular gamblers coming back, including free drinks, luxury hotel rooms and, in some cases, private jets.

The biggest casinos in the world are not necessarily located in Las Vegas, though that city is home to some of the most famous. The largest casino in Europe is the Casino Estoril on the Portuguese Riviera, which has been a hangout for spies, dispossessed royals and wartime adventurers. It was also used as a setting for the James Bond novel Casino Royal.

Winstar World Casino in Oklahoma, USA, is the second largest casino and features around 100 table games and 1,200 slot machines. It has a Salon Prive for high-rollers and a huge offering of restaurants, bars and shopping. Its Global Event Center and Roman Colosseum host big-name entertainers and top sports events.