i live in marin, and there are PLENTY of parks here, its WAY more safe, and is alot more mellow. not to mention, only 10-20 minutes from the city (depending on where you are) i would suggest somewhere in the marin headlands (rodeo beach has public bathrooms and a big parking lot, and is 10 mins from the city), MT tam, or somewhere in san rafael.
"you might want to sit down, this is going to feel unpleasantly like being drunk"
"whats so bad about being drunk?"
"ask a glass of water"