A casino is a building or room where gambling activities take place. It can also refer to the games of chance, like roulette, blackjack and baccarat, that are played there. Casinos are an important part of the amusement, recreation and hospitality industries. The industry is regulated in some jurisdictions.

Most casinos have a house edge that is mathematically determined to ensure that the establishment earns money over time. This advantage can be very small, but over millions of wagers, it can add up. Casinos can also collect a percentage of the bets made by players, known as vig or rake.

In the United States, the number of casinos is increasing rapidly as more states legalize them and more people travel to them. Some casinos are stand-alone facilities, while others are part of hotels, resorts or other large tourist attractions. In addition to traditional gaming, some casinos offer live entertainment, shopping, dining and other amenities.

Among the most famous casinos in the world are those in Las Vegas, with its iconic fountain shows and luxurious hotels. But there are many other notable casinos, including those in Macau, Monte Carlo and Lisbon. While a few casinos are themed around historical events or geographic regions, most feature modern architecture and technology.