I've been going to Philz a few times a week when I'm not down in Mountain View =) It's a really cool spot, park on lincoln during the week for 2 hours of free parking. Open till 9pm too, and good amount of space in the back.

Also, wonder if we could talk to the owners about "reserving" that back area where there's couches. Depending on the size of the group, might be doable without reservation.