There are over 400 stat posts on DMR. Browse the full list here.
All you have to do to earn the Detroit Motor City foursquare badge is like foursquare Cities on foursquare and then check in to five venues on a yet-to-be-posted recommended venue list (more than likely the most popular and obvious venues in the city).
You will then earn your shiny new badge and see the following message:
Hangin’ in The D, huh? From technicolor airports to Model Ts and The Temptations, it’s a pretty swell city. Nom a coney dog with everything, then scream your head off at a Red Wings game — you’ll fit right in.