We would play with friends on Killhouse. It's a fun board. Broadcast has so many spots where you can just decimate teams, it's almost kind of sad. Like the board room on the top floor, the one right before you go out onto the roof. Set up a claymore behind that tiny brick wall on the roof, have it face the doorway leading inside. Then put another claymore just inside the boardroom doorway. This way you have both paths covered and nine times out of ten you can get anyone trying to launch a grenade inside.
I've gotten massive kill streaks inside that room because people are constantly trying to get in it or go past it. Usually I'll crouch down at the far end of the table with a light machine gun and unload on anything that moves.