As far as I can find, all of tonight's games are at the home teams' gyms.
Tomorrow:
D1: Bellarmine-CV at Independence HS in Milpitas
Menlo-Atherton.McClymonds at Merritt College
Other two games at higher seed's home gym
D2, D3, D4 all at higher-seeded team's gyms.
There is a boys-girls-boys D5 triple-header at Kezar starting at 4pm Saturday.
This is all according to cifstate.org's website links to brackets on MaxPreps.
Of course, this is not infallable; I went to Merritt Wednesday for O'Dowd's first round game only to find that the MaxPreps site had it wrong, and I had to scramble to O'Dowd at the last minute. Might want to call the school you're most interested in to be sure, or check their own website.