A casino is a gambling establishment for certain types of games. It is usually built near or combined with hotels, restaurants, retail shops, and other entertainment facilities. The term may also refer to an establishment that offers only electronic gaming machines (either standalone or in conjunction with table games).

Gambling is a popular recreational activity and the biggest source of revenue for casinos. The gambling industry generates billions of dollars a year for the companies, investors, and Native American tribes that own and operate them. Several countries have legalized casino gambling, and many more have deregulated the industry to allow local governments to set their own gaming rules.

In addition to gambling, casinos often feature entertainment such as shows, a theater, and restaurants. Some even have a pool or a spa. Many casinos are also known for their comps, which are free goods or services given to loyal customers. Depending on the casino, these may include food, drinks, hotel rooms, limo service, and show tickets.

Unlike traditional casinos, which use bright and sometimes gaudy floor and wall coverings to stimulate the senses and make people lose track of time, modern casinos are designed to be comfortable and easy to navigate. They also offer 24/7 customer support via live chat and email, and their security measures are typically high. Some online casinos also have a dedicated phone number. In general, casino customers are male and over the age of 40, with above-average incomes.