From the FarmPlate glossary:
Similar to the CSA model, community supported kitchens allow consumers to buy items directly from food producers. Consumers typically pay to become CSK members and are then entitled to a certain amount of food each week from the kitchen they join. Most CSKs offer a phone or internet ordering system that allows individual shareholders to choose from a predetermined list of prepared food items (e.g. soups, stocks, casseroles, desserts, beverages, etc.) and then pick up their custom order weekly at the kitchen. There are a variety of CSK models around the United States, so the ordering and payment specifics may vary.