A building generally has walls, a roof, and a floor, as a bare minimum. The building might be a disco, or it might be a phone shop, or a library, or anything else. But before it is all of those things, it is just a building.
How? By changing the energy. By replacing high arousal activities with calmer ones and then practicing the new way of being in that place. HINT - You might need to swap high arousal for mid-arousal activities at first, before swapping down to low arousal activities, so your dog is better able to process the changes going on in his environment.
Remember - always choose Fun Not Fear®