In PB I used to love skating the double sided curbs on top of the banks in that christian center parking lot, on Hornblend between Ingraham and Jewell. They aren't red curbs but at this point they're probably pretty waxed.
The double sided curb at Ben Franklin elementary in the kensington area was the best, but I made the mistake of telling a blabber mouth about it and it kind of blew the spot up.
There are a few slapy curb options and a famous 3 up 3 down at the Board of Education buildings where Washington hits El Cajon. I never got kicked out of there and that was pretty much my daily spot. Then again I haven't skated any of those spots in over 10 years so who knows now.