Big Table! Need Halloween Ideas?

We are doing the 80's era at work and have a REALLY big table in the middle of our office (I mean about 12 ft long, 5 ft wide, 5 ft high). The sides are all solid because they contain cabinets. We have absolutely no idea what to do with it or how to decorate it. We need something because it is so big, it is a main focal point in our office. We're kind of on a tight budget, but any ideas would be appreciated!