Our local casting director for Calvin Marshall has connections at Oregon StageWorks, so we used that space a couple times. We used a meeting room at the Ashland Springs hotel for Conversations. The space at Mobius, especially their new space, would work really well. Anything could work, provided its got enough room for a video camera on a tripod to shoot a full body shot - an office, a classroom, a living room. If its a cattle call casting, you need space for the talent to hang out waiting their turn. If its a smaller handpicked group, you could get away with an anteroom or hallway.