Gainesville officials are looking to amend the city’s alcoholic beverage ordinance in hopes it will entice a South Hall business, which serves draft beer to go, to open on the downtown square. Growlers on Main in Flowery Branch can be thought of as a boutique package store, serving craft beer from the country’s finest microbreweries straight from the tap and sealed in glass jars (called growlers) ready-made to take home. Growlers have been popular on the West Coast for years, where microbreweries first took off in places like Bend, Ore., Petaluma, Calif., and Boulder, Colo.