California Code, Penal Code - PEN § 310

(a) Any minor under 16 years of age who visits or attends any prizefight or place where any prizefight is advertised to take place, and any owner, lessee, or proprietor, or the agent of any owner, lessee, or proprietor of any place where any prizefight is advertised or represented to take place who admits any minor to a place where any prizefight is advertised or represented to take place or who admits, sells, or gives to any minor a ticket or other paper by which that minor may be admitted to a place where a prizefight is advertised to take place, is guilty of a misdemeanor, and is punishable by a fine not exceeding one hundred dollars ($ 100) or by imprisonment in the county jail for not more than 25 days.

(b) Any minor under 16 years of age who visits or attends any cockfight or place where any cockfight is advertised to take place, and any owner, lessee, or proprietor, or the agent of any owner, lessee, or proprietor of any place where any cockfight is advertised or represented to take place who admits any minor to a place where any cockfight is advertised or represented to take place or who admits, sells, or gives to any minor a ticket or other paper by which that minor may be admitted to a place where a cockfight is advertised to take place, is guilty of a misdemeanor, and is punishable by a fine not exceeding five hundred dollars ($500) or by imprisonment in the county jail for not more than 25 days.