Let's face it. Rents are getting higher and the affordable spaces are getting smaller. So instead of going to IKEA to find shelving to economize cramped quarters, Savernack Street Gallery employs an innovative solution. The place is known for its voyeuristic approach, where you can view a single piece of art through a peephole in the blue-green front door. Measuring only a few cubic feet, the tiny exhibition space is all creator Carrie Sinclair Katz could afford to rent in San Francisco. She features one piece of art from one artist, and the peephole is open 24 hours a day. The gallery itself is as much a work of art as the artwork on display.