Completely off-topic here, but the coffee house mentioned in this Engine Yard article (Intelligentsia) is really the best coffee in Chicago--if not the US.
Also, there is no way that Groupon needs a data center--how can they be spending millions on hosting each month? Something doesn't add up...
Intelligentsia's pretty good, but they're going to have to arm-wrestle Ritual for the title "best in the US". ;)
Coffee comment seconded.
About to pull a few shots of Black Cat right now...