Overall U.S. beer consumption per adult age 21 and over is around 28.2 gallons per person, per year. Breaking these numbers down further, the average adult over the age of 21 is consuming about 10 ounces of per day, or roughly one six pack per week.
This is just beer of course, not including wine/liquor. So, if folks drank as recommended, it would cut the beer business by more than half, 3x.