A casino, or gaming house, is a facility for certain types of gambling. Modern casinos often include a wide variety of games, and may be combined with hotels, restaurants, retail shops, convention centers, and/or entertainment venues. Casinos may also be specialized in one or more specific types of gambling, such as horse racing, poker, or bingo.

Casino games typically provide a long-term advantage to the house, or “house edge”, while offering players the possibility of a short-term gain that may be large in some cases. Many casino games involve a significant element of chance, but some – such as blackjack and video poker – have skill elements that can eliminate the house edge or lower the player’s expected value. Players who have sufficient skills to make a positive impact on their chances of winning are known as advantage players.

Gambling games can be classified into three general categories: gaming machines, table games, and random number games. Gaming machines, such as slot machines, are played by one or more players and do not require the involvement of casino employees. Table games, such as blackjack and craps, involve a player competing against the house, with the game being conducted by a casino employee known as a croupier. Random number games, such as roulette and baccarat, are based on the selection of random numbers by a computer or other electronic device. Some people believe that the time of day or week can affect a person’s chances of winning at casino games. For example, some gamblers believe that slots pay out more frequently on Fridays after 6 p.m. because the casino begins to fill up, while others believe that a specific color on a roulette wheel (red or black) is more likely to appear after a series of frequent red or black spins.