Casino is a gambling establishment that offers a variety of games of chance and in some cases skill, such as blackjack and video poker. Most games have mathematically determined odds that give the house an advantage over players; this advantage is called the house edge. The casino makes a profit by charging gamblers for the right to play, collecting a fee known as the rake, or giving away complimentary items or “comps.” Most states require responsible gambling measures and provide statutory funding for organizations that can help problem gamblers.

Gambling is a major source of income for casinos, but they also seek to increase revenue by attracting visitors from outside the area and from other sources such as restaurants and shows. To attract and retain customers, many casinos offer clubs that are similar to airline frequent-flyer programs, with patrons able to exchange points for free slot play or discounted meals, drinks, and hotel rooms.

In the past, mob money helped casinos thrive in Nevada and California; however, government crackdowns on illegal rackets such as extortion and drug dealing reduced mafia involvement in casinos. Real estate investors and hotel chains had much more money than the gangsters, so they were more willing to invest in casinos and run them without mafia interference.

Casinos are designed to appeal to the senses, using sound, light, and music to stimulate the emotions. In addition, the machines and tables are arranged in a way that leads gamblers to spend more money than they intended to. The bright lights and noise are meant to make gamblers feel a rush of excitement.