The Little Guy has metal doors. I didn't want to drill holes in them. In fact, I didn't want to drill holes at all. I remembered a college roommate put up curtains on screen door springs. So, I bought two of those and some cuphooks. I screwed the cuphooks into the wall by the door. I made the curtains. Curtains are easy to make.

The spring and cuphook.

Sorry about the blur. The flash is not working.