I remember little of the movie Knocked Up, but the plot device in which that guy and that other guy end up going unaccompanied to Vegas because the rest of their housemates have all caught conjunctivitis by farting on each other's pillows is an invention of such implausible genius that I believe it must actually have happened to the screenwriter in real life.

The drunken Benny and the Jets karaoke is quite funny too, I seem to recall.

You should have suggested karaoke for this event, just to max out the horror.