Jessica Hauser wants to be able to buy organic food in her hometown of Detroit . But, since the Cass Corridor Food Co-op effectively shut down in 2004 because of financial troubles, that hasn\'t been possible for the 20-year-old Wayne State University student. Now she\'s volunteering her time and working with the co-op\'s board to revive the store, with the goal of reopening in April. \"I had seen other co-ops be successful, and it doesn\'t make sense to me that there\'s no successful co-op in the city of Detroit when it\'s one of the most unhealthy cities in the country,\" Hauser said Monday. \"I just have a lot of high hopes for the co-op.\" Co-ops are member-owned stores where members decide the types of food for sale -- often those not available at traditional grocery stores -- and get discounts on their goods. Begun in 1970 out of a church in the Cass Corridor, the co-op moved around the area over the years until settling at its artistically rich building on Charlotte , just west of Cass, with murals of food on the exterior.