4 ms·Cologne (Köln) http://www.meetup.com/Hacker-News-Cologne/ http://www.meetup.com/Hacker-News-Cologne/by _p6xs 14y agoCologne (Köln) http://www.meetup.com/Hacker-News-Cologne/ http://www.meetup.com/Hacker-News-Cologne/