I've been doing temp work at a location in SOMA - south of Market Street for the last 3 1/2 weeks. It's cubicle-land! My cube is at the corner of the bullpen. I constantly see tops of heads passing by. Sometimes a head will stop and actually talk to me. Being in cubicle-land sharpens the hearing. After awhile you can distinguish who is who by the sound of their walk. Also, nothing is secret unless you have mastered the whisper.
I'm sorta getting used to the work schedule of taking a 7am-ish bus to get to work by 8:30 and catching a 5pm-ish bus to get home. Boo-hoo, I'm forced to give up my night owl tendencies.
Here is great guide to crossing the street.