Any party that occurs after some sort of population-reducing apocalypse including, but not limited to, 2nd Ice Age, Zombie apocalypse
, Nuclear war, or Donald Trump
being elected President
of the USA.
In this post-apocalyptic world any gathering of people, such as at a party
, will be required to engage in coitus
so as to re-populate the world, the only people being exempted are those who are already pregnant.