Portland party favor

To perform a Portland party favor: At a pre-game party, hide in a room when everyone is leaving to go out for the night. Once the home is vacated, proceed to turn on music, continue drinking, and have fun while cleaning the entire place. Pick up all trash and recycling, scrub, dry, and put away every glass and dish, wipe every surface, organize furniture, etc. Leave the spotless place before its occupants return home. Never tell them that you did it.