Think luxury summer camp. This venue is massive and can easily accommodate more than 150 people in the dorm-style rooms, although the downstairs section can be rented for groups of 24 or smaller.
The venue is located on a working farm in the Cape Winelands, about 1h20min drive from Cape Town. It has a river running past the building with a tree-swing and a deck from which you can do some fishing. The courtyard has a fire-pit and there is a huge fully equipped self-catering kitchen.