Well, I’ve not seen it before, but if there’s enough space either side of the door, then this is an interesting idea! A door that turns into a ping-pong table with a foldable inner panel. There are drawbacks – one is that a side of the door needs to be dark green – not the greatest colour for matching to most room decors! There is a picture on the designers’ website here:

http://tobiasfraenzel.com/

And here’s a U-Tube video showing a model of it (I apologise – I think there might be a word of bad language at the beginning of the video):




Copyright credit – This picture (as used for thumbnail also): Image: digitalart / FreeDigitalPhotos.net