This is accessible in The Way 5 (and 4 maybe?) on the bottom of the casino to your left. At the far top left corner there is a gate. Press your commanding key (z, enter, whatever the hell works for you) and a 4 digit-code will pop out. I have no idea what the code is and I don'[t even have the slightest patience of entering 9999 combinations. Amazingly, this secret is not mentioned in Jabbo's FAQ so I want to get a shot at you guys to see if you have any idea what the code is or if extreme enough, randomly place in numbers and be really lucky. By the way, how many of you even know this?
Edit: Screw this, it's not a gate, rather its a wall with little holes in 'em. Whatchamacall'em thingamajigs?