I swear I'm not a Luddite, but I just don't see the advantage of these apps versus going out and meeting new people, no matter whether it's at a coffee shop, on the street, in a park, at a conference or at a bar. Investing your time in a few five minute conversations has got to be a better way to meet interesting new people than broadcasting your interests in a 100-yard radius and having an algorithm match you to people who happen to agree with your choice of keywords (and have to be using the same app.)<p>Can someone explain the appeal of these "ambient location" apps?