We start on the sixth floor of 600 W. Chicago Ave., west of Chicago's downtown, in an old Montgomery Ward building

A flashy LCD wall greets visitors

There's Groupon cofounder and CEO Andrew Mason's recent Forbes cover in the middle, surrounded by magazine covers of famous dotcom meltdowns, like MySpace, Netscape, and AOL. This is how Mason keeps himself grounded.

Our first stop is "Michael's room," perhaps the funniest thing about Groupon. "Michael," as the story goes, used to live in the Groupon office space before they moved in. The Groupon folks were kind enough to let him stay there. In reality, this seems to be a way for Groupon's comedy writers to blow off some steam, maintaining this bizarre room for an imaginary hero. Let's step inside.

Michael's room has wallpaper, a bed with burn marks, and lots of Cheerios boxes.

Groupon's wall of headshots: Many of the customer service reps are improv actors, which is actually good training, because it encourages quick thinking and positive responses