A casino, also known as a gambling hall, is a place where people gamble money on various possible random outcomes or combinations of events. The casino games are usually operated by a dealer and the outcomes are either recorded on paper or generated electronically. Some of the casino games have skill elements and players with sufficient skills can eliminate the inherent long-term advantage of the house (also referred to as the vigorish).

Most casinos are built as a hotel with many luxuries like swimming pools, restaurants that feature famous chefs and world class shopping. They are designed to attract tourists and locals and they rake in billions of dollars every year. The largest casinos are located in Macau and Las Vegas.

The Venetian Macau is the biggest casino in the world based on floor space dedicated to gaming tables. It caters mainly to Chinese gamblers and is one of the few in the region where English is not widely spoken. The casino features a full range of gaming machines and more than 800 table games spread across its large, lavishly decorated floors.

Casinos are generally staffed by security personnel. They employ a combination of physical security forces and specialized surveillance departments to patrol the premises and respond to calls for assistance or reports of suspicious activity. Modern casinos also have a number of security measures that are activated automatically, including closed circuit television, which monitors and records all activity within the facility.