There is no way I'd go hang out at StarBucks, even if I lived 2 hours and 15 minutes away. Keep a bag packed, be clean shaven, and have a uniform ironed. When they call you have 15 minutes to call them back, then 2 hours from positive contact (when you call them back in 13 minutes after they called you).
You'll be fine, and like everyone said, you'll get a feel for weather you're going to get called or not.
Good luck!
Tom