You give the ol’ shave-and-a-haircut knock and pause. A moment goes by before you hear two more knocks in a “two-bits” kind of way on the other side of the door before it swings open and a gust of wind blows you and Casey inside.
Once inside, the door swings shut behind you, leaving you and Casey in the dark. A faint radiance comes up from the wooden floor where you see a large letter “G” outlined in a white glowing paint.
You can make out a ratty couch against the back wall, and a staircase to the right of it. There’s a door to your left that hangs on one hinge and an empty doorway to your right.
You hear what sounds like shuffling footsteps from the floor above you.