Epic Games announced the return of the Horde Dance-a-Thon this weekend. This GearsWeened will give you extra XP and bonus cash the longer you can stay alive.
In Horde, you can gain interest on your cash and extra XP that compounds until you fail at a wave, at which point values reset to their original levels. Values will begin to increase again automatically, so you won't need to restart.
In addition to the Dance-a-Thon, this weekend also sees the return of the Brothers to the End Playlist. The 2v2 team deathmatch is one of the most popular playlists in Gears of War 3, so grab a buddy and get ready for some intense 2v2 combat.