The left?
The front of the Kennedy Center faces the lot where the cabs and buses pull in. The back overlooks the river. The Eisenhower stagedoor is on the RIGHT side of the building, right at the front. It's labeled with a plaque. It's the only thing on that whole side of the building. There is a staircase that goes down towards the Watergate complex next to it.
Other than that, there is no strategy. You stand there. They come out or they don't. There's 100 different exits to the Kennedy Center, so if they want to sneak out another way, it would be impossible to stake out all of them.
Like a firework unexploded
Wanting life but never
knowing how