Ok, I'll tell you what I do when I throw a party. I ski pone day of work, that's usually a definite thing. I get my room mate or myself to make hamburgers on the grill, usually two plates of it, turn on the music and the tv, bring the hot tub into the house. I usually put everything for the party in one room. I put in more toilets and sinks, sometimes even balloons. I'll call the people to start the party, and while I'm waiting for them to get there I'll take care of my stats, like eating, using the restroom, whatever. Once everyone gets to the party, I remove the doors so they can't leave and then everyone stays in the same room. Usually this works pretty well, and once it tells me I have a good party, I let everyone leave.