Location based social media - Square, path and more. Location is already an embed - location trails are a good hook but not enough for jaded users.

A niche market, can be used by people is malls, markets. malls can be customer to creating revenue

People are probably not ready for yet another social network.

Location-based social-media apps have gone through two lifecycles already. They come, get some traction, and then disappear. This idea has been tried. They need to study why so many ideas have failed or not gained so much traction.