The lights are down. The people who brought alcohol or dope are wasted, the people who didn't are wondering why this event was called a "party." The 8 girls on the committee, plus their two boyfriends (well, one is just a friend who is always around to help) are starting to clean up the decorations, ashtrays, and empty cups. Couples hold each other on the dance floor, with no longer any pretense of dancing.
You thought, you young 'uns, that "Stairway to Heaven" was always the last song for the last 30-plus years, because it's from the 70's and has been the last song your entire lives. But it wasn't. This was the last song. It sucked then, too.