I don't know specifically, the photos you posted were at City Hall. I don't know if the indoor masking mandate is for unvaccinated people or not. The rules are by city/county, not statewide.
The party was at Palace of Fine Arts.
Re City Hall : 48. Can a business or government office require employees and customers to wear masks?
Businesses or government offices must require that all customers and visitors wear masks indoors to reduce the risk to their workers and others. They should clearly post the business’ or office’s requirements onsite and online and apply them consistently. There are limited situations where wearing a mask is not possible or required, such as while actively eating or drinking, showering or being shaved.
Or Getty's wedding must have been not included, by mistake.