Great post. I remember riding my bicycle to one of the first McDs in Cleveland Ohio around 1962. I definitely remember the 15 cent burgers, they were quite tasty. There were no seats inside at all, just some benches built into the building exterior where you could sit if the weather was decent.
My friend in Wilmington, NC has five stores, and built a church from his 'tithe' (Dennis Anderson, Myrtle Grove Presbyterian (charismatics).