A casino is a facility for certain types of gambling. It is often combined with hotels, resorts, restaurants, retail shops, and/or entertainment venues. Some casinos are famous for their luxury, while others are known for their service or the number of games they offer. In the United States, the term casino may also refer to a specific game, such as blackjack or poker.

The majority of casinos feature a selection of card and table games such as chemin de fer (baccarat), blackjack, roulette, and pai gow. Some even offer video poker and keno. Table games are typically operated by live dealers and rely on random number generators, or RNGs, to determine the outcome of each hand or spin. In some cases, the house has a mathematical advantage over the players, which is defined by the rules and conditions of each game.

Many casinos offer loyalty programs that reward regular patrons with free or discounted meals, drinks, shows, and/or slot play. In the United States, these programs are often called comps or complimentaries. The perks are designed to encourage gamblers to spend more than they would otherwise, and to provide revenue for the casino in the form of commissions (known as the rake).

In addition to offering stimulating atmospheres, casinos focus on customer service. They are staffed with employees to assist gamblers and help them understand the rules of each game. Most casinos offer tutorials for novices and provide information on the odds of winning and losing.