Another good spot is if you get out the map walk around to the other side of the building where you can get on the roof, and have one person on the roof right where the top of the stairs are. Then have one person stay in front of the bar and kill all the zombies. You can easily get to 40+ with this.
Thats old..been doing that for weeks, another good one is couch as barrier when you open door to upstairs from juggernaut side, jump on to that couch, which is door that can be opened for 1k points and do lag switch when your team mate opens door (change something in settings and then do start + triangle lag)
@coats, yes you need lag switch for that, start and striangle lag. dont know buttons on xbox