(2) to discriminate against any person or group of persons because of race, color, creed, religion, national origin, sex, gender identity, marital status, status with regard to public assistance, disability, sexual orientation, or familial status in the terms, conditions or privileges of the sale, rental or lease of any real property or in the furnishing of facilities or services in connection therewith, except that nothing in this clause shall be construed to prohibit the adoption of reasonable rules intended to protect the safety of minors in their use of the real property or any facilities or services furnished in connection therewith; or