Anonymous sex in SF Bay area.

I will be in the San Francisco Bay area on the 5th-7th of September and want to set something up. I have had this fantasy for a long time of getting a hotel and posting online where I will be. I want to be on the bed, face down ass up, and have some guys anonymously use me.I am curious which city in the bay would get the best response, with the highest follow through of people. Also aside from craigslist, which websites would be good to post this at?Thanks guys.