ingress FTW! It got this geek out on the streets, wandering down 11th from 1st Avenue hacking portals to replenish needed supplies of L6 resonators and XMP bursters.
I also met Andy (below left) and entourage in "Back Forty" and spent way too long talking about Tor, why the commons is so important, DNS, and a whole lot more subjects that you really don't expect to wheel out in conversation with a merchant banker.
Earlier in the day (out on the street) I met Greg, who wanted to take my portrait and so inevitably ended up with me taking his as well. No comment. You can see his work on http://www.wereallstrangers.com/ - including (eventually) yours truly, I guess :-)