Kino Der Toten Black Ops Zombies Map
Turning on the Power:
To turn on the power, you have to make it halfway through the cinema to the backstage. There are two paths to the backstage area: the left alley path or the right dressing room path.
Open all doors except the door that goes from the "Alley" to the "Lower Hall". This will allow you to sit in the corner on the stairs and have 3 people facing the "Downstairs Fence Area" and 1 facing the Zombies Barricade by the Double Tap machine. You will also have access to all rooms now just a long trip to get back to the lobby for any box that may pop up there but worth it to only have to defend two entrances.
To view more indepth official Kino Der Toten Black Ops Zombies Strategy, pick up the official Black Ops Strategy Guide