if you're in san jo..
go to SCP.
Otherwise, your best bet will be CEPP
SCP = closest to you. okay competition.. carpet-like turf that you will most likely stick on. games go slow and the day moves slow as well.
CEPP = best of the three IMO. NPPL turf, clean bunkers and you dont even feel yourself hit the ground when you dive. Ref's earn way more than their lunch, games go and switch on and off quickly. best bet if you have a team or you know people who you can jump on with.
USPN (hollister) = very nice grass fields, fields set up very nicely. last time i went, there was only the team i was guesting with and one other. reffe'd our own games, games went on in quick succession.