What is the name for the bars that ran illegally during the 20's

Its called a speakeasy alson known as a blind pig or blind tiger

A speakeasy, also called a blind pig or blind tiger, is an illicit establishment that sells alcoholic beverages. Such establishments came into prominence in the United States during the Prohibition era (1920–1933, longer in some states). During that time, the sale, manufacture, and transportation (bootlegging) of alcoholic beverages was illegal throughout the United States.

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