A casino is a facility for certain types of gambling. Some casinos are built as standalone buildings, while others are combined with hotels, resorts, restaurants, retail shopping, cruise ships or other tourist attractions. Casinos also offer a wide variety of live entertainment, such as stage shows, concerts and sporting events.

The casino industry is a major source of revenue in many countries. Successful casinos generate billions of dollars in profits for the companies, investors, and Native American tribes that own them. They typically provide a predictable long-term advantage to the house, known as the house edge or vigorish, and allow players a chance for a short-term gain. Casino games are governed by a set of rules and regulations. Players with sufficient skill can eliminate the house edge, increasing their chances of winning.

In the twenty-first century, most casinos focus on customer service and offering perks to encourage patrons to spend more money. These perks are often in the form of free drinks and food, discounted or comped hotel rooms, luxury suites, and other extravagant inducements. High-stakes gamblers are often accompanied by a host or manager, and are given special attention and treatment. Many casino games have a social element, and players interact with each other, as well as with dealers and other employees. Some of the most popular casino games include blackjack, poker, roulette, and baccarat. Some casinos have dedicated rooms for these games, while others offer them as part of the overall gambling experience.