WHAT!? We have a Mary Jane's here on my block, and they swore they were not a chain store!
Seems like an obvious enough name... ;-) Maybe the missing(in the window)/misplaced (on the door) apostrophe is the only thing preventing a trademark war. Haligonians are pretty wily like that! (LOL!)
HAW! I see your point. Our shop's logo is the old classic Marlboro design with "Mary Jane" replacing Marlboro. Thinking about it, there's probably a Mary Jane's in every English-speaking city in the world. And around the corner from it, a place called "4:20."