This seems like a clever ploy to recapture some of the ground that Foursquare is taking, in that Foursquare has the deeper intuition on customer preferences lin

This seems like a clever ploy to recapture some of the ground that Foursquare is taking, in that Foursquare has the deeper intuition on customer preferences linked to social networking data - you have to use some identifying info to connect to the network, plus there’s the possibility these wireless routers may be scanning for nearby phones/computers. It could lead to the Yelp app advertising based on proximity to restaurants that people in similar demographics liked.