[Donut]

Any party must have mass amounts of chairs, couches, or something else people can sit on when tired. There's nothing worse for me than sitting on a floor after being completely worn out.

Otherwise, a collage of things would be best; place to eat, place to talk, place to watch a movie, place to play dodgeball (I'm suggesting Team Vs. Team, where every team gets an equal number of robots they can set up behind them and use as "artillery" to shoot at the other team), some kind of music (glowsticks always go well with this, our team has been making it a tradition to take glowsticks with us everywhere we go since Nats 2 years ago), and who knows what else.