First idea for me was Foursquare that people send out via twitter. You literally get a consistently named location. Do twitter searches on those names. Then @re

First idea for me was Foursquare that people send out via twitter. You literally get a consistently named location. Do twitter searches on those names. Then @reply them telling them that they should check flytivity. Mentioning user checkin counts and or active users in the airport would prompt interest. If people are comfortable with creating their own profiles that are publicly available you can then scan to see if someone's in your line of work or interests. Bonus points if you could create groups so that people coagulate and increase the comfort of meeting people knowing that everyone is a stranger and it buffers you from weirdos as it's more likely some people are normal/interesting/cool. Just my two cents.