>> Anyone born before 1985 can surely appreciate the simple joys of 8-bit electronic entertainment. Filmfest DC presents a documentary about a complex Iowa man fighting to retain his title as World Champion of Donkey Kong. King of Kong delves into the unique lives of people involved in this epic battle. [4000 Wisconsin Ave. NW, $9, 7 p.m.] >> Unbuckled alums Pela join Metropolitan and Five Four at Rock and Roll Hotel tonight. [1353…