Actually, its not even open to all C33 members, only the "platinum/premium" members. Old Gold members who did not "upgrade" to the new fee structure can't even get in. Its totally Disney snubbing them IMHO, and not right at all.
No code required. Just your party name. If you aren't on the list, you aren't getting in. No long hallway which curves, the first floor is really just the receptionist, elevator, and stairway. My table wasn't ready when I was there last, so I had some time to look around, and took some pics for another couple who came in while I was waiting.