More comfortable than it perhaps looks.
ClothesPeggS: Bed room for the homeless by Social-Unit (Wouter Kalis & Corinne de Korver) - Milan Design Week
Gallery - Adventure Hostel / Integrated Design Office - 25
toc hostel en barcelona de gca arquitectos (4)
The Pod Boutique Capsule Hotel - Singapore. I could see this in a loft apartment.
shop ReDo - Very "organic" industrial option. Please click to link. It's a youth hostel that uses the same material throughout
First Class Cabin at a capsule hotel in Japan