CCD is probably the first business in the Indian sub-continent which is trying to use Foursquare to increase the return rate of its customers:
Cafe Coffee Day on FS - http://foursquare.com/cafecoffeeday
Makes sense as a good majority of their patrons are young and tech-savvy people who would love to use location-based social networking service like Foursquare.Welcome, We’ve got some exciting specials brewing. Get a 15% discount on your 3rd check-in. If Mayor, we’ll serve you a free coffee and a 20% discount on every 3rd check. Visit fs.cafecoffeeday.comUnlocked every 3 check-ins
Cafe Coffee Day on FS - http://foursquare.com/cafecoffeeday