Omni Commons has three stories (basement, ground floor, and second floor).
The total area of the building is approximately ~22,418 ft2 (square feet), which is ~2083 m2 (square meters).
Below are detailed drawings by Rod Lamkey (design services) as of January 11th 1996. Lots of details and dimensions, but a bit hard to read in places. Here's the original file.
And cleaned up versions of the same file:
The following floor plan images have been annotated with corresponding names/numbers for the logical sections of the building. A full composite plan is provided, along with a file for each floor. The individual files should be sized 1 pixel to 1 inch.
Usage floorplan (non-architectural, drafts by joel)
Proposals of Usage
Current Floor Plan
The following proposal is highly inaccurate, it's a first-stab gesture so we can drastically reshape and correct it.
This spreadsheet contains an estimate of the size and features of the spaces, based on name/number: https://docs.google.com/spreadsheets/d/17DINigEczGwjfTdmdxl-MpYe1KJzJJDeCHRQnMC9usg/edit#gid=1418749855
You should be able to easily edit the "svg" version using Inkscape, available on every platform (Windows, Mac, Linux).
Draft Initial Proposal
Another possible plan for space allocation
Draft Name Proposal