I tried Priceline, separately using all four of my preferred zones and free rebid zones, first for 6 nights, then for the first three and the last three nights, then for the two weekend nights, up to a maximum of $125 a night, and came up empty handed each time. I also tried to get the Hyatt Embarcadero, which was available on request through lastminutetravel.com, and got turned down. So I'm going to stick with my reservation at the Intercontinental through my travel agent friend for $146 a night. However, I wanted to thank you all for your help and input. Next time.