two parties from the famous website.
basically, a group of people have a party with a lot of drinking, hooting, dancing, and hollering. sooner or later, the stripping, sucking, and fucking begins, continuing to facial finishes.
you have to be there (i.e., watch the dvd) to understand the "energy" of the scene.
category note, it's not really a gang bang in any sense of the term. none of this series is a gang bang, but all are in that category.