A casino is an establishment where gambling takes place, and it usually includes a wide variety of games. Many casinos are also resorts, or places that offer lodging, dining, and other amenities such as entertainment and sports. Some casinos specialize in certain types of gambling, such as poker and horse racing. Other casinos may have a more general atmosphere, and offer gambling on a smaller scale.

Casinos make money by charging a fee for each bet placed, known as the house edge. This advantage can be very small, sometimes less than two percent, but it adds up over time as patrons place millions of bets. This money is used to pay for casino luxuries such as restaurants, free drinks and stage shows.

Gambling was once considered a taboo activity, but since the 1990s it has become legal in most states and is regulated by state laws. It is estimated that there are more than 100 million people who gamble in some form. Many people are able to keep gambling in check, and do not let it interfere with their lives or their families. Others struggle with addiction and seek help to overcome it.

There are a number of things that make casinos popular, including their bright lights and the opportunity to win large sums of money. Casinos are found all over the world, from Las Vegas strip hotels to tiny mountain towns whose 19th century Wild West buildings are filled with slot machines and card tables.