https://plus.google.com/u/0/+AndroidDev ... DbmRW7QH5R
Google Play Games has added the ability for players to find each other nearby in multiplayer games with the latest Play services update. Through games that support Play Games multiplayer, players can now invite others nearby into the same game when starting a multiplayer session, creating more local competitive and cooperative experiences. Learn more about Play Games services and multiplayer support here. (http://developers.google.com/games/services/)