The way we do a Room's party is:
We usually do it at a fraternity house and all of the guys usually break into teams of 3 or 4 persons (so the drink won't be as costly) and they usually give my sorority a room that we can make our drink in.
So if there are 10 teams we will have 10 different drinks plus the one my girls make.
Most drinks are usually done kitchen sink style (just thrown together in a container). We usually buy a Rubbermaid container and throw everything in. That way the only mess that people really have to deal with is plastic cups and you don't have to worry about running out of a specific alcoholic beverage or mixer.
I'll post pictures Monday