I know everbody remembers the most western of all the obscure grocery stores in the avenues: Your Market on 48th between Kirkham and Judah. It's still there. That is a very old market. Probably served up staples to earthquake refugees.
When I was a kid I'd go there mainly because my friend, Jimmy Hoyer, live down the block from it and that was his home market. It was small, crowded and dank, even then it seemed old even for the 50's.
Thinking about all those old grocery stores almost brings back the particular smell that each one had. The offactory process came into play whether you liked it or not when you entered the store. I shop at Albertson's now where most odors are sanitized.