There usually at Paremoremo, 86 sanders road, which is up north.
You gotta be there at 9:30, and the games start at 10:30.
They either post them up on the forums or have pamphlets in the shop.
But games mostly depend on the weather, and the weathers looking good lately
Also look in the war game section in the forums constantly, sometimes there up 2 days before the actual game.