My apartment is a very long hallway.  When I moved in 3 years ago, I created a painting studio by curtaining off a section with some old velvet theatre curtains.  Though very successful at constraining light, sound and fumes, they collected too much dust and I've gotten tired of tripping over them.  So! Last month I built sliding walls that glide easier and look much cleaner.

The wall frames were jointed with a handsaw, then drilled and chiseled to make room for the rollerblade wheels.

Roller blade wheels purchased on ebay

This is the top "track" that the wheels will fit into. When attached to the wall, it can move up and down about an inch to compensate for floor irregularities.

One finished wall! (open and closed)

A detail shot from the back - notice the framing and the wheel.