A particularly successful form of multi-stakeholder cooperative is the Italian social cooperative, of which some 11,000 exist.  1 Type A social cooperatives bring together providers and beneficiaries of a social service as members.
The sport of Quidditch gets its name from Queerditch Marsh, the location of the first recorded game. A witch by the name of Gertie Keddle lived on the edge of the marsh around the year 1050 and recorded what she saw in a diary that survives to this day.
Quidditch matches are played on (or rather over) an oval-shaped, 500 feet (150 m) long and 180 feet (55 m) wide pitch, with a small central (core) circle approximately 2 feet (0.61 m) in diameter.