To start, what you really want is a group of people who have energy, enthusiasm, creativity, and are able to focus.  You want a bunch of people who can interact with each other and have fun.
assitant
Oh. Well let's see. Are you in high school?
assistant
Do you know of any fun games to play on Halloween night?
user
I think the general rule is that you can play any fun game you want on Halloween night!
assistant
That's very true. However, I am interesting in hearing your ideas.
user