What a good idea, sounds like a lot of fun! You may want to rethink the "no
one leaves" thing. Do you have a taxi sevice in your area? Your guests can
use that for transportation.
Do assign bottles, but make sure that you assign ones that don't hit some
individuals pocket book too hard. That lawyer that makes $160 an hour can
afford to bring the Chivas, however the guy down the hall putting himself
through college should be assigned a beverage a that is a little cheaper!
My favorites right now are, Dirty Girlscouts and Russian Queliudes.