here is a Drunken barn dance as described by I'm Matt Murphy Bitches.

What exactly is a Drunken Barn Dance?

A Drunken Barn Dance is what happened the night before when you wake up in a safe place, but are unsure exactly how the night ended. (or why there are someone’s undergarments in the yard, or where that funny smelling stain on the floor came from, or maybe even why the denny’s staff now approaches you with their eyes down)

It is equal parts good booze, good friends, good (bad) attitudes and a safe(ish) place to play. (hide the scissors and sharp objects, hand over the car keys)