People tend to check in during these times:
Studio 99 has cool exhibits
Update: The Microsoft Visiting Speaker series now has a limited number of $10 books. No longer free, but still a great deal.
Clean and calm, this pleasant campus cafeteria is a good place to get a bite, but ask the chef not to grill your salmon fillet a minute longer than needed (5 min) Mine was dry like fish jerky today.
work work work
Try the awesome coffee shop at the lobby
Participate in Microsoft User Research
Ask @lokeuei about his trip to Vegas. EPIC!