Star vs. partial mesh

I am working on a paper for class. The gist is that we are connecting 200 computers (servers and desktops) located in 12 rooms on two floors. We need to identify the physical topology that we plan on using (bus, ring, star, or mesh). Bus and ring are out of the questions as they are antiquated I guess. A star makes sense for one room, but not when connecting multiple rooms together. Would a partial mesh (or hybrid) make more sense? Thanks for helping me out here.

​

EDIT: A bit more research shows that a ring topology is not necessarily antiquated, but generally used in WAN environments.