A blind pig, also known as a blind tiger or booze can, is an establishment that illegally provides alcoholic beverages. The name originated in the United States in the 1800s, when blue laws restricted the sale of alcoholic beverages. A saloonkeeper would charge customers to see an attraction (such as an animal), and provide a "complimentary" alcoholic beverage, thus circumventing the law. It was during the years of prohibition that blind pigs were most common in the U.S. Estimates of the number of blind pigs in some major U.S. cities in the mid-1920s are: