In urban residential buildings courtyards serve as an interspace between public and private. It is a space open (to the sky) and enclosed (by the building walls) at once, where a lodger steps into the semi-public eye of the fellow lodgers. What is nowadays mainly used as a compound site to park bicycles, keep outdoor plants and collect waste, has historically been serving much more and much diversified purposes. Some of the earliest known courtyard houses have been built in China and Iran in 3000BC and people used them for cooking, working, sleeping, gardening or for keeping animals. However, the mix of natural light, intimacy and good acoustics makes the average courtyard a good spot for a semi-outdoor session. Kvetching residents are a possible drawback.