Well, to be more precise, the party happened last night, so it's already ended.
When I was checking my mail around 7:20 p.m., I could hear people on the complex grounds going "woo!" like it was party time.
This sort of party atmosphere kept going on when a small dog, I'm guessing a chihuahua, went after a woman. The little dog barked and snarled (I was only listening to this going on outside, so I didn't actually see any of it), so I don't know if it might have also nipped at the person it was threatening. How do I know it was a woman? I heard another woman ask her, "Are you okay?" and the other woman replied, "No."
After that event broke up, I could still hear the occasional "woo!" going on.
The shouting and carrying on didn't end until I went out onto the walkway to see why the Pantry Punishers (the whole household) were insisting on loitering right outside MY window and speaking loudly. I went out there with a scowl and my cell phone, ready to call the cops. The Pantry Punishers went back inside their apartment and the party ended after this.