The grantee shall not subject any person or group of persons to any prejudice or disadvantage, preference or advantage, in connection with rates, charges, service, facilities, rules or regulations. Nothing herein shall prohibit the provision of free cable service to government, institutional or school buildings, or the provision of free cable service to the grantee’s employees. Notwithstanding the foregoing, the grantee may negotiate bulk or special rates for businesses, hospitals, nursing homes, multiple dwelling units and other non-single-family residential users.