Aside from
the one for the kitchen, those plaques are irrelevant as well! You won’t be going into locked rooms, for the most part.
The placards are a great reference to their actual apartment, though—life at the Dakota is recounted extensively in the Mind Games coffee table book. There are actually quite a few little Easter eggs in the game
(names/descriptions of artwork, masks, etc.) that are reflected in the record of John & Yoko’s life, be it official books, film, or photographs.
