Five hundred enthusiastic real ale drinkers frolicked at the sold-out Firkfest this past Saturday.  Founded by Gregory Nagel, Firkfest is Orange County’s premiere cask-conditioned ale festival. What is cask ale? Cask-conditioned beer is a natural, living product.  At the end of the production process the beer is not filtered, pasteurized or artificially carbonated. It’s placed…