Sorry Brian but the person you contacted at White Castle is obviously an idiot.... Or so I've been told.
That is interesting though that their timeline never shows them expanding into Oklahoma but they say they had a location in Muskogee. I'll have to file that into my list of handy information for the next time SoonerDave and I argue over White Castle.
I ate at the location in question and remember the reason we stopped was because they advertised $0.25 hamburgers and as a poor high school student that was a heck of a price even in the late 80's. I also remember the burgers having that school cafeteria flavor which is nothing like the flavor of a White Castle.
I also know there is a Pickle's American Grill right down the street but for some reason I have it stuck in my head that Pickle's was the name of the location in question.