Four Square is a location-based social networking service. It allows users to check-in to a location and share their experiences with friends. It also provides users with personalized recommendations Four Square is a location-based social networking service. It allows users to check-in to a location and share their experiences with friends. It also provides users with personalized recommendations of places to visit based on their check-in history. Users can also earn badges and points for their check-ins. Four Square also allows users to connect with friends and find out what places they have visited. It is a great way to discover new places and share experiences with friends. of places to visit based on their check-in history. Users can also earn badges and points for their check-ins. Four Square also allows users to connect with friends and find out what places they have visited. It is a great way to discover new places and share experiences with friends. ... more