Indeed, the atmosphere of the second meetup was quite different from that of the first one, obviously as a result of the smaller count of participants. However, there were no less interesting topics and awesome discussions (concluded by three of us on a tram about timeless decision theory...)

Organizing when to have the next meetup is also in progress, mainly using Doodle polls by Katya. By the way, I really like the place, too (sofas & tables to sit at and a really nice, kind of international feeling to it).