Blind pigs and blind tigers

The term "blind pig" (or "blind tiger") originated in the United States in the 19th century; it was applied to lower-class establishments that sold alcoholic beverages illegally. The operator of an establishment (such as a saloon or bar) would charge customers to see an attraction (such as an animal) and then serve a “complimentary” alcoholic beverage, thus circumventing the law.
“In desperate cases it has to betake itself to the exhibition of Greenland pigs and other curious animals, charging 25 cents for a sight of the pig and throwing in a gin cocktail gratuitously.”[4]
“[They] are in a mysterious place called a ‘blind tiger,’ drinking the very bad whiskey for which Prohibition is indirectly responsible.”[5]
The difference between a speakeasy and a blind pig was that a speakeasy was usually a higher-class establishment that offered food, music, live entertainment, or even all three. In large cities, some speakeasies even required a coat and tie for men, and evening dress for women. But a blind pig was usually a low-class dive where only beer and liquor were offered.