acid house party
Term referring to the parties and the gatherings of the late 80's which later evolved into raves. Acid house, a popular genre of house at the time, gave the parties their namesake. The music was much more moody and sinister than the now soft and pleasant music of the club and dying rave scene, and had a much more hard and machine-like edge. Acid house parties themselves took place in cramped buildings or warehouses, with low lighting and a trance-like feel.
"acid house parties are over, man" said the young twenty-something. "Raves are now in full swing."