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1.
A "progressive" party with several "stops".

Participants spend time at each stop, eventually ending together at the final prog stop.

Often, each stop is themed.

For example, in an around-the-world prog party, each stop will have the theme of a different place.
Person 1: Hey, are you going to the prog party?
Person 2: Nah, I'm busy until about midnight.
Person 1: Well, that's when we end at the final prog stop. You should come!
by LMAOZEDONG January 09, 2012