The Eagle Gyms Facility in Overland has a bare bones look, just the equipment, some paint on the wall and you're set to go.
That's all it needs. They offer several punching bags, all the free weights you could ever need and plenty of space to use them.
The staff is very happy to help with any questions you have, they'll help design a workout routine for you or just cheer you on if you need some support.
Good workout facility.