The Great Khan longhouse consists of 4 rooms. The main room is where Papa Khan, Regis and Karl sit at a dinning table. The first room to the right is Papa Khan's room, and the door is locked, requiring a 75 Lockpick skill to open. Next to Papa Khan's room is Karl's room. The opposite side of the building to Karl's room is the kitchen, which contains various food items.
The Great Khan longhouse appears only in Fallout: New Vegas.