DCist’s highly subjective and hardly comprehensive guide to the most interesting movies playing around town in the coming week. Sumo practice in Erez Tadmor and Sharon Maymon’s ‘A Matter of Size,’ playing tonight and tomorrow at the Washington Jewish Film Festival. Washington Jewish Film Festival Tonight marks the opening of the 20th iteration of the DC Jewish Community Center’s annual film festival, with the mid-Atlantic premiere of A Matter of Size, an Israeli film about…