Greetings from Overpriced Land! (aka: Silicon Valley.)
What you're asking is pretty tough, and since I live here, I don't have much occasion to book hotel rooms around here. I did make a couple of calls on your behalf and some friends advised that they do well booking all sorts of last minute hotel rooms through priceline.
Hope that pans out for you!
best regards,
-levi
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Travel is a powerful antidote to contemporary American arrogance.