What is Foursquare and how do you use it as a person or a business. http://screenr.com/EBC.
What is Foursquare?
How to Unlock Your World with Foursquare
Foursquare's New Swarm App
Introducing: Foursquare for iOS 7
Is Foursquare a Waste of Time?
Como Funciona Foursquare