Support and common accessory services. All support facilities, functions and services shall be intended for the use and benefit of the residents of the congregate housing facility. Such services and facilities may include but are not limited to management offices, indoor and outdoor recreation, therapy and testing, entertainment, libraries, food preparation, dining, linen services, housekeeping, security, administration, nursing, banking, pharmacy, a maximum of two units for temporary lodging of guests, barbershops, beauty parlors and sales of sundries, personal articles, food and similar convenience products to residents.