Multiplayer Level Layout

For my level, I was thinking something indoors. I like when there is a lot of tight corners to run around and enemies potentially being around every corner.  Also, this will help with closing players off from other areas. It would probably be set in the fall around late afternoon, to get some nice shadows going. I'm thinking that this would be more of an empty office/reception area, where there wouldn't be too much stuff. The architecture will be modern to futuristic. Because its indoors, there wouldn't be any terrain or vegetation. I don't plan on including any windows that you can see out of (this may change). If it does, then probably rolling green hills (maybe fires due to the aliens). I'm going to go with, some sort of alien envision happened. Fortunately for this building, it was on the outskirts of town and the workers had time to evacuate. So besides the occasional paper on the floor, it should be relatively clean. Here are some inspirational images:

The assets that I'll probably need are tables, reception desk, railing, chairs, trashcans, and light fixtures. 

I definitely want some long shadows.