I made a club for Gears 3 players on Xbox Live. The purpose is to provide a network in which players can coordinate games, which will hopefully mitigate some of the problems that are involved with trying to play public matches.
The name of the club is Gears 3 Arcade. All are welcome. Search for it on the console or join here:
https://account.xbox.com/en-us/clubs/profile?clubid=3379835278021055&activetab=main:clubactivityfeed
Club description: Gears of War 3 - Fresh blood, old school. Because frankly, the series just isn’t the same without reavers, Silverbacks, and flamethrowing scorchers. Join me in celebrating a timeless classic, where we can organize scheduled and impromptu gameplay sessions specifically for Gears 3. Check back frequently for live LFG posts.