This building, on Pinestraw Road just below Satchelford Road, was a convenience store in the 1970s. I can't now recall if it were a "national" brand or a one-off, but I don't think it lasted very long. I'm not sure why -- the area is mainly residential, and I would have expected a good bit of foot traffic, especially since kids were still allowed to roam a little at the time.
At any rate, after the store closed, the (somewhat remodeled) building was still apparently in use, but never for anything "public". I think I saw service type trucks pulling in and out a few times, but it was always a bit mysterious. I guess that has ended, as the building is now up for lease.
UPDATE 22 September 2016: add Young's to the post title and update the closing date from 1970s to early 1980s based on the comments.