When I lived in SF (Nob Hill) I had at least corner grocery stores within a 10 minute walk. One full service grocery store, and 2 more full service grocery stories if I extended to a 15 minute walk.

The corner stores were small and had limited selection, but had a decent produce selection, and the store closest to me had a daily meat delivery, so I could ask for pretty much any cut of meat and they'd have it for me the next day. I'd usually make a weekly trip to the full store for staples, and then stop by the corner store for daily needs.

But nowadays, proximity to grocery shopping is moot for me since I just shop online and have it delivered.