Danny Farrin is one of the youngest beer brewers in Georgia and the United States — if not the youngest. “I’ve done my research,” the 22-year-old, who works at Left Nut Brewing Co. in Gainesville, said with a smirk. If nothing else, Farrin represents a new generation finding a career in the brewery industry. “I was fortunate to get in the door at a young age,” Farrin said.