There were folks who were surprised I was there, but that surprise was always “Oh! Cool! You’re here!” rather than “Why are you here?” And that, of course, is a salient difference. No one questioned my reasoning for being there, or suggested, say, that I was a Fake Romance Boy, or quizzed me about who my favorite romance author was or if I could recite that author’s bibliography to their satisfaction.
This is how it’s done. Instead of wondering how a stranger has penetrated your midst, show them around and tell them what they’ve been missing.
Perhaps it’s just a delivery system for olden-days hairdos and Dame Maggie Smith.