So typically SF with doorways jammed next to each other, businesses shoehorned into places you can't believe they'd fit, and every square inch of window and wall advertising their products. Add the local passerby and you've nailed it. Great shot.
Seems as though he's checking out the young lady on the poster, but she's on the phone... :-) I will say it looks like a decent cleaners - those are sometimes hard to find!