Hi, David -
I'm "leasing" Muir/Carson as one site. Take your pick, and the empty room is open only for quiet activities. Muir is big - too big for many activities. Carson is cosy, perhaps the cosiest of all our gathering rooms. If you're signed up for the Muir/Carson slot, you get your pick.

Madrone is another that's open only for quiet stuff, and it's not being booked - Bay is identical, and the women asked me not to schedule Madrone to allow better access to the women's restroom.
That's one of those "difficult" questions....
-Joe-