...Jake (the guy who moved into my old room) had somehow agreed to let some film production company use the apartment to shoot a gay porno. WTF? The narrative of the movie called for the porno to be taking place at "a party" so Jake called up everyone pleading for them to come over and help it look like a party.
The dude in the green shirt was one of the "actors" in the movie (if you knowwhatimsayin). He spent his pre-scene time getting completely drunk and telling anyone that would listen that he wasn't gay and was just in porno for "the money." (...shots, probably).