I grew up in Va. and we didn't have Sonics. We would take my mom lunch when she was working second shift at Lipton Tea. We would stop and get burgers at a Riches fast food place. Hot dogs were .15 cents and burgers were .20 cents. Gas was .27 cents a gallon.
That is because SONIC didn't exist outside of Oklahoma for the longest time, then a few popped up in Texas, Kansas and Arkansas that was it until the late 90's early 2000's when they went big and spread everywhere.
I can remember when you didn't eat at a SONIC unless you were in Oklahoma or driving through. The food was much better then.
Another place I always liked to go eat and they are almost all gone now are the Del Rancho drive ins. It was always a treat to go up to OKC and hit a Del Rancho for their steak sandwich . As a kid I thought that was big time to get to order one.