It's been 10 years since Jody Thompson and Cali Ressler put police tape across the entrances to their cubicles and walked away for good. "We got this tape that said, 'Cube Free.' And we said, 'We're going to live it. This is what it looks like,' " Thompson remembers. The two women were human-resource managers at Best Buy at the time, tasked with incorporating more workplace flexibility at company headquarters.