I'm not sure a rotating location would help if there's a frame to be carted around. I would make a contract or just a paper with the rules in them so they all know what is expected. I would also assign "clean-up" on a rotating basis so everyone can help you clean up the mess left behind and also set up a monthly schedule on who provides what for meals. That will weed out those who really don't want to pull their weight from those who truly enjoy the company. Oh, and no alcohol allowed ;-)