In addition to a few others, this one would seem to be an easy call for most of what I saw from the news:

PC 415

Any of the following persons shall be punished by imprisonment in the county jail for a period of not more than 90 days, a fine of not more than four hundred dollars ($400), or both such imprisonment and fine:
(1) Any person who unlawfully fights in a public place or challenges another person in a public place to fight.