n9888s is actually their R44, which I'm currently training in. Nice machine, at least I think so. They're called Sirius Flying. They will let you solo, but I don't know what conditions they attach to someone they didn't train with them - it is possible, I know, because I know a UK based pilot who flies there, but he's a CFI in the UK. However it probably takes bigger commitment than a short trip.
There's another heli school at San Carlos, which flies a Schweizer. I don't now much about them. There used to be one at Reid Hillview (San Jose) until an unfortunate incident last summer involving night scud running and power lines. I don't think they're in business any more.
n5296s