Thanks to Drew Reed for the location suggestion. 1941 postcard courtesy of zilf.
"I can think of another narrow street in LA, and a live one no less: Olvera!" writes Drew. "It probably doesn't fit your implied criteria as it's closed to vehicle traffic, but at least we have one semi-street that comes close to what you envision."
Not to worry, Drew — just because Olvera is car-free doesn't mean it's any less "real" than any other street!
Every Friday I'll post a favorite narrow street snapshot from somewhere around the world. Got a Friday favorite of your own? Send me your photos!