If you live/passthru/visiting near Solano county in Northern California - here's some info on a couple of spot's where you can find naughty action sometimes....
Funville (in Vallejo) - it (believe it or not!) actually has a lil tiny movie theater stuffed in there! (with theater style seats and all!). Cost's $10 for admission. The theater is a nice place to maybe make a connection or two, if not maybe find yourself a play partner outright. The REAL action tho is happening in the men's bathroom that's at the verrrry front of the theater (behind the movie screen).... If there's any kind of crowd at Funville at all, then there will surely be some naughty action happening in there. Last time I was there, I got down on my knees and was surrounded by a never ending supply of cock's that I sucked on for over a hour and a half (knee's REALLY started hurting. so that ended my fun). So yeah, for oral action u get all you want, anyway you wanted it. Mainly it's all guy's that go. Weekend's and evening's after 5pm are the best time to go.
Vista Point on 680 (Lake Herman exit, Benicia) - Hmmm, definitely a hook up spot. BUT there are local cop's that occasionally patrol there at likely hour's (aka from around 9pm-3am) - so you gotta be wary of that. Mainly I see hook-up's happening there during morning hours (4:30am-8am) - lot of times you'll get guy's that want to bust a nut on the way to work and like the easy on n off there... It is a romantic spot tho hang out at dusk, watching the sun set over the mothball fleet with you special somebody...
Either case tho - you wanna WAAYYYY increase you odds of getting some action then post an ad on Craigslist a couple of hours before you go telling everyone of what your plans are!!! Then your almost guaranteed of findin' whatcha lookin' for!!
Me personally, I kinda like foolin' around at the waterfront area (in Vallejo).....
Hope the info helps!
Cheer's,
Reena
PS then there's always the Power Exchange and the Citadel in SF... Or Steamwork's in Berkeley