Casino Wikipedia
From Ancient Mesopotamia, Greeks and Romans to Napoleon's France and Elizabethan England, much of history is filled with stories of entertainment based on games of chance. In military and non-military usage, a casino (Spanish) or Kasino (German) is an officers' mess. The Catalina Casino, on Santa Catalina Island, California, has never been used for traditional games of chance, which were already outlawed in California by the time it was built.
The archipelago of Malta is a particularly famous place for casinos, standing out mainly with the historic casino located at the princely residence of Dragonara. The third-biggest casino operator company (based on revenue) was Caesars Entertainment, with revenue of US$6.2 billion. The casino industry is a major part of the tourism and leisure industry, with the largest casino operator companies generating tens of billions of dollars in revenue annually. Some of the most famous not on gamstop casinos in the world include the Monte Carlo Casino, The Venetian Macao, and Caesars Palace. Slot machines have become one of the most popular forms of gambling in casinos.

Some casinos are also known for hosting live entertainment, such as stand-up comedy, concerts, and sporting events. Most casinos do not meet the requirements for certain protective measures, such as protection against airborne metal dusts from coins or hearing protection against high noise levels, though these measures are still implemented when evaluated and determined necessary. According to some police reports, local incidence of reported crime often doubles or triples within three years of a casino's opening.

Over the past few decades, casinos have developed many different marketing techniques for attracting and maintaining loyal patrons. The physical security force usually patrols the casino and responds to calls for assistance and reports of suspicious or definite criminal activity. Modern casino security is usually divided between a physical security force and a specialized surveillance department. Security cameras located throughout the casino are the most basic measure. Unofficially defined, a "casino" typically denotes a well-established and professional gambling establishment that is generally lawful but exclusively caters to foreign players. Based on revenue, Atlantic City, New Jersey, ranks second, and the Chicago region third.
In addition to cameras and other technological measures, casinos also enforce security through rules of conduct and behavior; for example, players at card games are required to keep the cards they are holding in their hands visible at all times. Some casinos also have catwalks in the ceiling above the casino floor, which allow surveillance personnel to look directly down, through one way glass, on the activities at the tables and slot machines. Machine-based gaming is only permitted in land-based casinos, restaurants, bars and gaming halls, and only subject to a licence. Video lottery machines (slot machines) have become one of the most popular forms of gambling in casinos. Casinos have been linked to organised crime, with early casinos in Las Vegas originally dominated by the American Mafia and in Macau by Triad syndicates.
The percentage of funds returned to players as winnings is known as the payout. All casino games have a mathematically determined advantage for the house, known as the house edge, which ensures that the casino will make a profit in the long run. Common games include craps, roulette, baccarat, blackjack, and video poker. However, in 1931, gambling was legalized in Nevada, leading to the rise of Las Vegas as a major gambling center. Casinos are often built near or combined with hotels, resorts, restaurants, retail shopping, cruise ships, and other tourist attractions.

During the 19th century, casino came to encompass other public buildings where pleasurable activities took place. The term casino is of Italian origin, from the root word casa meaning "house." Originally, the term referred to a small country villa, summerhouse, or social club. These are not the extent of the hazards casino workers may be exposed to, but every location is different. Casinos are subject to specific regulations for worker safety, as casino employees are both at greater risk for cancers resulting from exposure to second-hand tobacco smoke and musculoskeletal injuries from repetitive motions while running table games over many hours.
Many casinos use a loyalty rewards program used to track players' spending habits and target their patrons more effectively, by sending mailings with free slot play and other promotions. Both of these specialized casino security departments work very closely with each other to ensure the safety of both guests and the casino's assets, and have been quite successful in preventing crime. Given the large amounts of currency handled within a casino, both patrons and staff may be tempted to cheat and steal, in collusion or independently; casinos have security measures to prevent this. In Vietnam, the term "casinos" encompasses gambling activities within the country.
With gambling laws being less strict than in Italy and Switzerland, it is among the most popular gambling destination besides Monte Carlo. The casino was founded in 1917 as a site to gather information from foreign diplomats during the First World War. Casinò di Campione is located in the tiny Italian enclave of Campione d'Italia, within Ticino, Switzerland.