When you try to make an infopass appointment for PP stamping, it asks for your home zip code. After that you don't have much of a choice.
I wanted to go to San Jose instead of San Francisco. I asked my lawyer if I can go to San Jose. The reply was NO. SO I went to San Francisco and the experience was very bad.
I am not sure what difference it will make from USCIS side whether I go to San Jose or San Francisco. But did not want to experiment once my lawyer advised against it.
Did FP from San Jose though instead of Oakland. At that time, I did not ask the lawyer for any advice.
-novis