I did jury duty at the Crown Court a few years ago, and met a Debian maintainer and MSR researcher over the course of a week. And far more oddly, I met a friend of one of the Dasher developers who saw me using it to reply to some mail because my keyboard had broken.
In a jury lounge with around fifty randomly selected strangers this doesn't seem probable, and I can't imagine a similar outcome if I'd been at Bedford(which I think is the next closest crown court).
I'm more accepting of bumping in to fellow travellers at the curry house or pub, because we're choosing to go where others suggest. Still, Cambridge is joyously weird.
Note to self: Probably should have used the jury duty downtime to meet some interesting "normal" people though.