MozCoffee held at the Stock Exchange
I've worked with these guys since 2003, and these are hard-core open source advocates, as well as Firefox users. These guys are users of GNU/Linux, FreeBSD and Mac OS X, and normally also use these technologies for their application deployments.
Among the topics that we discussed were the Firefox for Enterprise users, as well as auto-update functionality. Newer versions of Firefox use silent updates that were normally blocked by corporate firewall. Also among the topics were marketing opportunities.