Bartender Kara Drouin pours a draft Friday at the newly opened Gritty McDuff’s Brew Pub in downtown Auburn. The pub met its target of opening in time for this weekend’s Great Falls Balloon Festival. The mugs hanging from the ceiling will be available in a few weeks. For $50 per year, patrons can have their own mug and be eligible for beer specials at the Auburn pub and at the other Gritty’s locations in Portland and Freeport.