Was having dinner at a popular student hangout near campus, with my friend from school, her bf, her bf's friend, her sister, a mutual friend of her sis and her bf. One can draw a relationship graph with weighted edges! We were all programmers to various degrees as well.
Had some pretty good catching up and conversations, mostly about work and research. Talked about puzzle hunts too.
There was a brief Mark Zuckerberg sighting as he was leaving with his Asian girlfriend. I stared for about 2 seconds when he was outside texting, just to confirm :-P We were thinking about doing a group stare but didn't happen, too bad!