The iPhone Starbucks app in action. Photo: Kris Van de Sande on Flickr
Using social media to brag about your love of gigantic coffee chains has its benefits.
The store will give away 500 $40 gift cards to latte-lovers who unlock a "Tribute Badge." Those who do not want to buy a cup of coffee can also enter the contest by emailing firstname.lastname@example.org and putting “Starbucks Foursquare Entry Submission” in the subject line.
Winners will be drawn March 16.