I've lived in SF for the last decade, and I really see a difference. I know it's not that much less urban than Brooklyn or Queens, but it's the zoning. I don't have a convenience store on my block, much less a pizza restaurant or salon. We have a local bar, and have a similar relationship with the folks there as we did in Brooklyn, which is nice, but again, it's hard to get to know the folks in your "commercial zoned district" because everyone is slammed together, and you don't see them every day. Even though I live three blocks away, I'm still a face on the crowd.
There's honestly a big difference between a shop on your street and a shop a few blocks away... because everyone in the neighborhood is a few blocks away.