share-house
n.— «Many weekenders stay in what is known as a “share-house”, sprawling mansions shared by as many as 30 twenty-to-thirty-somethings, who often sleep six to a room in a scenario that calls to mind the TV shows Big Brother and MTV’s The Real World.» —“A home for the holidays” The National (Abu Dhabi) Aug. 15, 2009. (source: Double-Tongued Dictionary)