http://www.christopher-robbins.com/SleepingInSpandrels/

Spandrels are unplanned-for spaces, forgotten architectural details, like the triangular space left beneath a stairwell, between an arch and the ceiling, under a bridge, behind a door...
The term has been adopted by many professions to indicate the re-use of structures for purposes other than the originally intended - even body parts!

Spandrelling means using these empty spaces, building structures for sleeping, eating, looking at stars - turning negative spaces into positive places.

Douglas Paulson and I have been spandrelling Denmark, building a series of guerilla shelters along the waterways of Copenhagen, creating a map for these alternative places, and organizing events at the waterborne nooks.