Pap Datta hopes to turn Gainesville into the next hub of the craft beer industry, and he will ask the Gainesville Planning and Appeals Board tonight to rezone a brick warehouse along Maple Street, near Wild Wing Café, so he can launch Left Nut Brewing Co. The former Hewlett-Packard executive and Forsyth County resident considers himself a connoisseur of beer. Several micro-breweries have emerged in the metro Atlanta area in recent years, perhaps the most notable being SweetWater Brewing Co., which explains Datta’s desire to locate in Gainesville.