Gambling has been a favorite past time for centuries, all over the world. Many versions of the popular casino games that are currently still loved are said to have origins in China and Europe. Craps, roulette, and poker are just a few of the many games found in casinos today. The gaming industry, although controversial for some, is a lucrative one. There are illegal ways to gamble, but the options for the legal entertainment found in casinos offer fun for anyone over the age of 21.