Whrrl was a social location-based game developed by the Seattle-based company Pelago, Inc.
Whrrl had a recommendation engine that uses algorithms and users' votes to surface relevant recommendations.
On June 30, 2010, Whrrl launched its Society Rewards Program, designed to close the gap between a brand’s online social media and real-world presence with its first partner, Murphy USA Oil.
Groupon announced that it had purchased Whrrl on April 18, 2011. As Whrrl dissipates, it is being speculated that Groupon will leverage location based social networking or "check-ins" on their popular group coupon site.