Any out of the way location outside a house, preferably down the side of the house or worst case behind a shed or garage. A deluxe Shotgun Alley will have a small knife or screwdriver attached to the fence via an old piece of string. The purpose of Shotgun Alley is to gather a small team of elite drinkers from the house party for a 'Shotgun Alley run.'
As the night progresses usually (and foolishly) someone will suggest swapping from the standard can shotgunning to take standing in a circle taking turns swigging from a bourban bottle (see also "Ring of fire", "Highway to the Danger Zone", or "Ubers Inbound"
Psst. Shotgun Alley, 1min, tell Monique.