We just finished the electrical contracting on these:
http://www.garageunitz.net/home.html
North Denver, CO area. Pretty nice. Once you purchase them you can finish however you'd like. Some guys even run small machine shops and CNC shops out of them. Others just a great man cave type of thing. They are tall enough to put mezzanines in for a second floor. Pretty much so as long as its environmentally safe, you can do as you please since you own the units. The next phase of this project has a nice lounge to watch sports, etc. and the final phase has a car wash. Pretty cool. Sort of like having a golf membership at the club for the non golfer car guy!
Wes