If you are looking for an old fashoned soda shop the S & T may be what you are looking for. The hot fudge sundae that I had today was made with real hot fudge, not Kraft. Linked below is a scan of their sweets menu. The other side has savory items from burgers to salads.
It's in Pittsboro in the block just north of the circle and on your right coming from Chapel Hill.