A casino is a building or room where people can gamble. The games played in casinos are usually chance games of pure luck, although there are some skill-based games as well. The house always has a mathematical advantage over the players, and this advantage is known as the house edge. In some cases, the house may also take a percentage of the winnings as a fee, which is called the rake.

While the majority of casino revenues come from gambling, most casinos offer other forms of entertainment as well. These include floor shows, restaurants and shops. Some casinos also have golf courses and spas. The casino business is highly competitive, and many companies use perks like free hotel rooms and buffets to attract customers.

In addition to offering a variety of casino games, the best online casinos offer a wide range of banking options and responsive customer support. They accept a variety of payment methods, including credit cards and cryptocurrencies. Some also offer a mobile app for their site.

In the United States, there are dozens of legal casinos. These range from the glitzy megaresorts in Las Vegas and Atlantic City to smaller gambling houses in Iowa, Native American reservations, and other locations. In the early 1990s, many state governments realized that they could capitalize on tourists who came to gamble by legalizing casino-style gambling. This gave rise to the modern casino industry.