Do Marvel or DC Give Tours?
My mother was able to wangle a tour of Marvel in the 80’s for my brother, a big fan, by saying that she was the sister of (insert name of Marvel editor here). As it happened, her brother does have the same name as that Marvel editor, so it was not strictly untrue, and when the editor came out to visit, he was charmed enough at her chutzpah that he gave my brother a tour anyway.