Frankfurt Open Data Day 2016 -- Frankfurt Stadtteilfinder Tinder
Use node.js and R to present the user with random Google Streetview Images of Frankfurt. The user can "swipe" left (don't like) and right (like), and the application will tell him which district his is favourite.
http://ec2-52-11-118-34.us-west-2.compute.amazonaws.com:3000/