Oh, and for both River and Lan, I've played it that there's a certain resemblance to other people who share the same PB, but that they don't look precisely alike. You might mistake them at a quick glance, but not at a long one. This has been most relevant with River and Cameron, and they dress differently and move differently as well as not looking quite alike. (This includes the aforementioned makeup and hair-brushing.)

Will is the only one who's had a doppelganger; way back in the day, we had some That 70s Show characters around who mistook him for Topher Grace's actual character. He was never in-bar AFAIK, though, so it was only confusing for Hyde et al.