George Spelvin's apartment is a large spacious studio type apartment in New York City. It is heavily decorated with items from Asian culture. The primary room is a large open area with a fireplace, wet-bar, large windows and high ceilings. It is large enough to practice fighting skills and spar. It is the scene of the fight between Sterling Archer, George Spelvin, Keiko Chan and her sister.
It is possible that it also has one of those large Japanese soaking tubs.