My office houses a foosball table and I used to work at a company with a bowling alley in the basement, but they don't quite compare with these amazing work spaces. Just look at the glass phone rooms or the way they differentiate the men's and women's restrooms with photos of the employees at Quirky in New York City. There's an actual slide and massage area at the Google offices in Zurich. Of course, Pixar is cool, but I think this glass box stuck in the middle of nature is my favorite. It houses an architecture firm in Madrid.
[found here: Quirky; Google Zurich; Pixar; Selgas Cano]