It's not that surprising that places like Popcap Games encourage their employees to learn from the competition, but even non-game related business like law firms and automotive websites are finding that games improve office morale and productivity. Employers also note that game rooms help attract younger employees and makes a hell of an impression during an applicant interview.
Still, aren't office game rooms an invitation for employees to goof off all day? Apparently not -- none of the businesses Entrepreneur found needed to impose any limits on play. As one employer paraphrased, "the only employees who might have trouble in this type of environment are the ones that can't regulate themselves." And those people are probably playing Minesweeper all day anyway.