"Imagine it with us: you’re at a concert and notice on Foursquare that a bunch of your friends are there, too," reads a post on the startup's blog. "But you don’t know where they are or how to get everyone together. You open up groupme.com/foursquare on your phone, check off all their names, and you’re instantly dropped into a GroupMe. With one text, everyone can plan where to go next."
The new feature only covers your Foursquare friends, so if you're looking to include a friend who isn't on Foursquare or get in touch with a cute stranger at that concert, you're still out of luck. The app highlights the friends that are checked in near where you are checked in so that they're easy to add to a group, but it also allows you to add any of your Foursquare friends.
GroupMe will be presenting the new feature at a Foursquare Hack Day in New York Saturday. The developer who created the feature, Pat Nakajima, named it John Mayer ("It's a Foursquare API wrapper, designed to 'just work,' just like all of John Mayer's hooks and sweet guitar licks," he explains). He is open sourcing a lot of the code.