The 25th of July is the world-wide NodeBots day: https://github.com/nodebots/nodebotsday .
The event is a joint meetup between Arduino and Munich Robotics Enthusiasts and will be held on the 25th of July from 14:00 to 18:00 at MuMaLab (Baierbrunner Str. 28, 81379 München).
Hope to see a lot of you there!
Please give us a sign of interest as early as possible to let us better prepare required hardware.