The amount of conversation you get with strangers, learning more about different people.
Hope I don't sound too self-promotional, but you can check out Strangers for Dinner: http://strangersfordinner.com
It's worth considering that people who are more likely to use such a site might be more introverted than the average person and perhaps less likely to have a Facebook account.
Our system can make heuristic guesses (and validate that you're a real person) about your interests by using Facebook, so it's gonna be difficult to replace for the time being.
Sorry about your non-experience with SfD
I thought it was a bit weird you used Pyongyang as the default. If you had picked any other foreign city I would have assumed it was a foreign website and given up then. Probably better to leave blank (I had to delete Pyongyang, so this would have saved me typing) or fill in using IP geolocation.
I used Pyongyang as a form of negging. The idea was to use repugnance to force people to change the form. There is a IP geolocation version coming out really soon (as well as other features)
Do you have any suggestions on how to fix it?