Facebook is testing a new feature named Find Friends Nearby.
This feature can come handy to quickly locate people in your surroundings.
It requires people to be running this Facebook app on their mobile devices or computers to work.
The concept behind this app is simple. You are at an event and want to add people you are meeting on Facebook. All the parties can turn on this feature on their phone and find each other on the network to connect.
A Facebook developer spoke about this functionality:
I built Find Friends Nearby with another engineer for a hackathon project. While it was originally called ‘Friendshake’, we settled on ‘Find Friends Nearby’ for launch (the URL was a little bit of a homage to the previous iteration). For me, the ideal use case for this product is the one where when you’re out with a group of people whom you’ve recently met and want to stay in contact with. Facebook search might be effective, or sharing your vanity addresses or business cards, but this tool provides a really easy way to exchange contact information with multiple people with minimal friction.