Beer in the United States
On January 16, 1919, the Eighteenth Amendment to the United States Constitution was enacted into law, creating the Prohibition era, wherein the production, sale and transportation of alcoholic beverages was made illegal. All legal American brewing came to a halt when prohibition was imposed, though the earlier temperance movement had already reduced the number of breweries significantly. Only a few breweries, mainly the largest, were able to stay in business by manufacturing near beer, malt syrup, or other non-alcohol grain products, in addition to soft drinks such as colas and root beers. Production and shipping of alcohol was largely confined to illegal operations that could deliver compact distilled beverages—smuggled rum and domestic moonshine—more efficiently and reliably than bulkier products such as beer.
Prohibition in the United States
Prohibition also had an effect on the music industry in the United States, specifically with jazz. Speakeasies became very popular, and the Great Depression's migratory effects led to the dispersal of jazz music, from New Orleans going north through Chicago and to New York. This led to the development of different styles in different cities. Due to its popularity in speakeasies and the emergence of advanced recording technology, jazz's popularity skyrocketed. It was also at the forefront of the minimal integration efforts going on at the time, as it united mostly black musicians with mostly white audiences.