Bathroom - towels on one side, toiletries on the other
Entryway - add coat hooks on the open side, and store shoes on the closed side - or build two and hang a hook bar in between in a long hall
Living room - build two, one on each side of the tv!  Perfect for board games, controllers, and books.
Nursery - everything baby needs can fit inside!  Keep the diapers and wipes on one side, the collectible toys and outfits on the open side
Dining room - display beautiful dishes on the open side, hide board games and arts and craft supplies on the other
Office - keep your office neat but still functioning - decor on one side, everything else behind the door
6' tall x 48" long x 1' deep