I'm more a weekday player, but have a scant hour to hit on Sat. near SanPabloPark. Been getting a set or two in, then gotta go.
You should drop by there around 9 thru noon. Nice 3.5 to 4.0 doubles pickup tennis, mostly cool guys and gals, but seldom see better players that early. I think the good guys come out later in the afternoon.
There's 6 courts, usually 3 with rotating doubles going on, so chances of rotating in are pretty good if you can wait 1/2 hour.
I'll be there around 10:15, but gotta leave by 11:30.
Since I don't work, it's mostly weekday tennis for me.