1. Asking them to talk to you as if they know you is implicitly asking them to reveal quite a lot about their personal life; a life which you, as a prospective employer, has absolutely no business poking your big nose into. Don’t ask about their personal life.
2. As “JMTQp8lwXL” pointed out in another reply, this also opens your selection up to selection bias to prefer your personal preferences, not what would be good for the role. This kind of thing is, unfortunately, rampant, and leads to enormous monocultures where everybody who works at a certain place seems to be the same person; they all dress the same, like the same things, talk the same, and look the same. This is the very opposite of diversity.