Regionally oriented retail shopping centers, consisting of integrated developments of such uses as retail stores and shops, personal service establishments, department stores, professional and business offices, banks, post offices, restaurants, theaters and auditoriums, housed in an enclosed building or buildings and utilizing such common facilities as customer parking areas, pedestrian walks, truck loading and unloading space, utilities and sanitary facilities, and other necessary and appropriate accessory uses, subject to and in conformance with the regulations cited herein.