Foursquare is working on a venue harmonization map that does this. See: http://blog.foursquare.com/2011/03/14/1up-the-importance-of-platforms-and-how-we%E2%80%9

Foursquare is working on a venue harmonization map that does this. See: http://blog.foursquare.com/2011/03/14/1up-the-importance-of-platforms-and-how-we%E2%80%99re-extending-ours/ http://blog.foursquare.com/2011/03/14/1up-the-importance-of-...