On my brewery tours of Asheville, I tell participants the history of beer in the US, and one of the major events in US brewing history was Prohibition. The outlaw of the manufacture of alcohol in the US changed the trajectory for beer for the next 80 years. Before Prohibition, many brewers were extremely successful and had built large business enterprises. One of those breweries was the one owned by the Yuengling family in Pennsylvania.
Before the devastation of the Volstead Act, the Yuengling family had earned a lot of money brewing beer. In the boom times, the patriarch of the family smartly invested in gold, railroads, and a dairy farm. This dairy farm would become a major enterprise for the family when they were forced to stop making beer for thirteen years.
Most large breweries had mechanical refrigeration by 1920, so the Yuengling family smartly combined this asset with their dairy farm and started an ice cream company. Even after Prohibition was repealed the ice cream business was popular enough to keep it alive until the early 1980s. The brand was shut down at that point, but the Yuenglings announced recently that their once famous ice cream will be back on shelves throughout the mid-Atlantic soon.