place to crash in San Diego

Can anyone offer me a place to crash Saturday night in San Diego? Alternatively, is there a cheap hotel that is easy to reach by a car-less person?

How do I get to the Futurists' meeting?

I can be reached by email at optimizelife.com, the name is what scientists do, 7 letters, ending in "ence".
... or by phone at 412-728-3176.