Bucking the national industry 3.4% drop in domestic box office, Alamo Drafthouse Cinemas announced today that their domestic box office sales increased for 2011, up 2.6% over 2010 sales. The figure encompasses all locations in the circuit that have been open since January 2010. Total net sales, including figures from the cinema eatery’s food & beverage sales, were up 4.8% since 2010.