A casino is a facility for certain types of gambling. The modern casino is like an indoor amusement park for adults, with the vast majority of entertainment (and profits for the owner) coming from games of chance. Slot machines, blackjack, roulette, craps, keno and baccarat provide the billions in profit that casinos rake in every year. Musical shows, lighted fountains and elaborate hotels help draw in the crowds, but casinos would not exist without the games of chance that drive them.
Most states regulate casinos based on their gambling laws. The state gaming control board or commission creates rules and regulations for gambling operators, plus oversees licensing and enforcement. Casinos must have adequate security to protect their patrons and employees. This typically includes video cameras and other technological measures. In addition, some casinos have catwalks in the ceiling that allow surveillance personnel to look directly down, through one way glass, on casino tables and slot machines.
Something about casinos seems to encourage people to cheat and steal, either in collusion with others or on their own. This is why casinos spend a lot of time, effort and money on security. Some casinos even employ security guards who rove the floor, looking for suspicious activity. A childhood friend of mine once worked security at a casino in Atlantic City. He quit after 3 months because he was so disgusted by the number of people who stood at slot machines soiling themselves because they believed they were on a winning streak.