We loved Antero Kjaer's use of twin beds as a sofa/guest bed in her small home. Here's yet another twin bed under cover in a stylish home.
As seen in House Beautiful, Roman Alonso used a twin bed covered with painter's linen as his living room sofa. Add a long bolster to the "back" and you have what looks like an expensive custom sofa, not a simple box spring and mattress covered in affordable material from the hardware store!
Be sure to check out the rest of Alonso's home, too: A Los Angeles Apartment with Bohemian Decorating Style.
Image: Amy Neunsinger/House Beautiful