No space in your tiny basement apartment for a regulation size ping pong table? With this homemade project- the ping pong door- anyone with a doorway can have a mini size ping pong table. You have a doorway right? The table flips down within the door itself, so you can still use the door as you normally would once you have the table folded back up. It’s probably not big enough to get a good game of beer pong going, but it’s still a nifty idea. Yeah, I said nifty. So what.