According to Mashable, Groupon has agreed to share an undisclosed share of revenue with Foursquare. Groupon, however, isn't Foursquare's only daily deal partner. Earlier this month, it rolled out partnerships with LivingSocial, Gilt City, AT&T Interactive, BuyWithMe and Zozi. Foursquare users in the U.S. and Canada will start to see Groupon's daily deals in the Explore tab of the application and on Foursquare.com beginning Friday, Mashable reports, adding, "Friday's release confirms what has long rumored: Groupon and Foursquare have been in talks for some time."