I use Foursquare whenever I travel. I find it especially useful when I am in a new airport. I can usually get information of the best security lines, best place

I use Foursquare whenever I travel. I find it especially useful when I am in a new airport. I can usually get information of the best security lines, best places to eat, where outlets and wifi are, etc. If you read HN then you understand the benefit of reading users comments after you read an article. Foursquare lets you read users comments while you are visiting a location. However I am not sure if/how this translates to profitability so I am not speaking to that end.