I've used PW/BWD on men I don't personally know (all were musicians, since thats my type) in fact I'm still working on one now, after a few months break, whom I've had the most results with;
I met him briefly at his bands gig last September, did sessions on his for about 2 weeks afterwards. In January I flew to another state for a concert that his band was playing at, I did another session the night before. When I met him I told him where I flew from and he looked as if he was trying to recognize/remember me and gave me a hug that lasted longer then what it probably should have, he also showed some resistance by completely ignoring the side of the crowd I was in during his bands set, most recently he's liked my comments on his Instagram posts and has even replied to one.