It’s the Friday before Labor Day weekend. You’ve just returned home from work, tired but excited for the glorious three-day weekend ahead. It’s the perfect chance to read a book. But which one? Before you can ponder, your cellphone rings. A glance at the caller I.D. tells you it’s your outdoorsy friend, famous for both her last-minute plans as well as an aversion to text messages. You sigh, not sure if you’re prepared for an early morning trek to Mount Diablo, or a spur-of-the-moment trip to Santa Cruz. With her, it’s always an adventure, but you’ve been looking forward to hanging around the apartment this weekend.