A casino is an establishment for gambling. It offers a variety of games, including poker, blackjack, roulette, and slot machines. In addition to gaming, many casinos offer live entertainment and other resort amenities. Casinos are most often located near or combined with hotels, restaurants, retail shopping, cruise ships, and other tourist attractions. Some casinos are owned by government entities, while others are operated by private companies.

In the twenty-first century, casinos have become choosier about whom they allow to gamble. They focus their investments on high rollers, those who wager large amounts of money over long periods of time. These players are sometimes given special rooms separate from the main casino floor, where the stakes can be in the tens of thousands of dollars. In return, they provide the casino with a proportionally large share of its profits. High rollers also receive comps, or free goods and services, such as hotel suites, meals, tickets to shows, and limo service.

Something about the casino business seems to encourage people to cheat, steal and scam their way to a jackpot. This has made casinos devote a huge amount of time, energy and money to security. Casinos employ a wide range of technological measures, from cameras to computers that monitor game play for statistical deviations.

Some casinos have a glitzy image, with fountains, towers, and replicas of famous landmarks. Other casinos are more modest in size and decor, but still feature a variety of games and a high level of customer service. In either case, the average casino has a built in advantage over the player, known as the house edge. This can be as low as two percent, but it adds up over the millions of bets placed each year.