Prohibition begins

Prohibition begins

The 18th Amendment and the Volstead Act take effect; the manufacture, sale, and transport of alcoholic beverages becomes federally illegal. Coffee assumes the role of the dominant public social drink in restaurants, hotels, and lunch counters. The shift almost certainly accelerated the 1920s expansion phase H&H entered immediately after the Hayman buyout — though a primary San Antonio source linking the two locally remains an open research thread.