Thumper, some fold into the wall above a queen sized sofa. Like the Murphy bed at the Kauai Marriott I mentioned above. You would not believe the illusion. I thought we were given a room with a sleeper sofa.
Here are some like that:
http://www.decoist.com/2014-05-14/murphy-bed-couch-ideas-space-savers/
The backrest pillows have to be removed, and the bed drops down above the sofa.