BPC § 23428.28

For the purposes of this article, “club” also means any beach and athletic club that owns, maintains, or operates a standard Amateur Athletic Union (AAU) swimming pool together with the necessary facilities and clubhouse, has a minimum of 500 members paying regular monthly dues, and has continuously operated for not less than one year.

No license shall be issued to any beach and athletic club qualifying as a club pursuant to this section if the beach and athletic club in any manner restricts membership or the use of its facilities on the basis of age or any characteristic listed or defined in subdivision (b) or (e) of Section 51 of the Civil Code.