It's that time of the quarter, the one that everyone from the big boss on down to the interns dread: corporate party time. And whether you're working in a skyscraper downtown or an office in the suburbs, there is no avoiding the inevitably awkward team-building exercise weekend. It would be like something from a sitcom, except it's your life: the product launch party where nobody quite knows how relaxed they're allowed to be, so you all go about stiffly trying not to smile too broadly. Now there's something to look forward to! TGIF? Not quite…