A casino, also known as a gambling hall or a gaming club, is a place where people gamble and play games of chance. It is a popular form of entertainment for many people, and some casinos offer free drinks and stage shows as a way to attract visitors.

Some casinos specialize in a particular type of game, such as craps or blackjack. Others offer a variety of different games, including the classics like roulette and poker. Most casinos have bright, sometimes gaudy decorations that are intended to stimulate the senses and increase the likelihood of winning. Red is a common color for casino floors, since it is believed to be the most effective at increasing the energy level of patrons.

In the United States, casinos are licensed and regulated by state governments. Many states also tax gambling winnings, though the amount is often less than in European countries. The gambling industry is heavily regulated in order to prevent corruption and money laundering, and it is common for casinos to employ security measures such as cameras and guards.

Although gambling probably existed in some form before recorded history, the modern casino as a gathering place for multiple types of gaming did not emerge until the 19th century. Nevada became the first state to legalize casino gambling, and its success inspired other states to do the same. Although some casinos grew to be enormous, many more are much smaller and focused on specific markets, such as Las Vegas or Atlantic City. The number of casinos continues to grow as more and more states legalize gambling.