I lived in MN briefly in the late 80’s and don’t recall a White Castle. Perhaps a little time has passed.
I remember eating at a White Castle in St. Paul on New Years Day, shortly after 1 AM.
We were on our way home after playing a New Years gig at a bar in St. Paul. It was 1973.
I remember it because of the frozen Spaghettios somebody yacked up outside the front door.