There are 1500 seats. With portable bleachers that goes up to about 2500. For the bigger games, USC, LB and Stanford, there attendence suffers because they sell more tickets than there are seats. Concession stands suck. Food is terrible and overpriced and service is slow.
Restrooms are way too small to handle the crowd.
CSF clearly has to do something in order to be able to host regionals. But attendence is usually good. Crowds average about 1200 or so. Most of it depends on the weather during Feb. Night games can be freezing during those times. Also during Feb they should schedule Saturday day games not night games.