It’s called “speed flatmating” in London, and The Telegraph describes how it works:
This is the property world’s version of speed-dating. People with rooms to let put on orange-coloured name badges and sit at tables labelled north, south, east or west, according to the part of town where their accommodation is located.
Those who are looking for places to live (white name badges) circulate round those tables, in the hope of convincing their orange-badged counterparts that they would make the ideal flatmate.
Will Chicago be next?