New picture from Hal;
With the caption, "take a chance. it will be your last."
Now, I know we've ruled out a Casino House, but behind the door appears to be a casino. You can see the red curtains and lights in the top right corner. Now, in my opinion it could be anything, a scare zone, a house, or even just some concept art. However, it does appear that there is a Casino, regardless of its purpose.