Cornerstone College - Gymnasium — Mount Barker, SA. Cornerstone College's Gymnasium is one of several school facilities made available for hire outside normal school operations in Mount Barker. Mount Barker Council confirms that the college offers its gym, ovals, theatre and meeting or workshop spaces for sports activities, exhibitions, markets and community events. The college's space-hire platform separately names the inbarendi gymnasium/multipurpose hall, but the public catalogue does not establish a single approved event configuration for the generic Gymnasium record. Hirers should confirm if the requested facility is inbarendi, its sport court dimensions, seating, accessibility, equipment, school safeguarding rules and weekend availability. Check the current availability, permitted uses, fees and equipment inclusions with the operator before making a booking.