Contrasted with the open spaces of the Colarado Lounge, the Gold Room (Jack) and the outside spaces - the maze (Danny) these upstairs hallway scenes feel confined. MATTRESSES are slumped over, here we see two. Kubrick had previously explored the physical space of WW1 trenches in 'Paths Of Glory', these confined halls could be those trenches - the slumped mattresses playing the part of dead SOLDIERS.