What you’ll need: A tracksuit (Adidas is the standby favorite of both dictators and hooligans) in any color, and of course, a cigar. Other add-ons can be a walker, or wheelchair (depending upon how tired you are feeling). Now, the difference between going as Zombie Castro or just plain Castro is only a matter of more wrinkles, and a possible phony eye-socket.
What you should do: If you decided to go as Zombie Castro or just normal Castro, either way you’ll want to only respond in unintelligible mumbles and groans, with perhaps one or two Vivas! throughout the course of the party.
Otherwise, that’s about it. Just sit there for the entire length of the party and well after the last guest has left. Continue sitting at your host’s place until the first Spring thaw and then maybe, if you’re bored head home to your own place.