Gravitas Ventures has acquired rights to Beers of Joy, a feature documentary directed by David Swift and Scott Owen that examines the history of brewing as the backdrop to tell four stories about the, er, craft. It will hit theaters in 10 cities day-and-date on March 1. The pic, done in a partnership with Anheuser-Busch, follows a brewmaster at 10 Barrel Brewing Co traveling across Germany and Italy to discover the secrets to brewing a true Berliner Weisse; a beer…