California has banned all mass gatherings of 250 people or more until the end of March.
The decision is in response to the rapidly spreading coronavirus outbreak.
Health experts advised that smaller events could be held if organizers implemented distancing of six feet per person.
More than 1,200 cases of COVID-19 have been reported in the United States, with 38 deaths.
Globally more than 126,000 cases of coronavirus have been confirmed, with over 4600 deaths.