Was that a question, Chad?
Well, yeah, maybe they were RC Colas(which actually, yeah, I do like better than Coca-Cola), but "Out West" in California, at least back then, most folks would use the term "coke" to describe all soft drinks...at least as I recall, anyway.
I know "Back East" in some areas they'd use the word "pop" and/or "soda" in the same way.