02.16.2015 @ 11:00 am - 6:00 pm Tasting Room Open President’s Day Old Ox Brewery 44652 Guilford Drive, Unit 114, Ashburn Lift a pint to George and Abe ... the Tasting Room will be open from 11:00 to 6:00 p.m. Bring your own food or order in ... no food truck will be onsite.