It can take quite the few tries to get the right event in the restroom. It's 25% or 20% chance to get it. The event number roll resets if you leave the restroom and come back. Have you done that or gone through the events?
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Go in to the restroom, check the number on top of the right door and then if it's not correct, go out to the docks and them come back in again. This way you can quickly check what event is behind the middle door. I tested it on my dev build and the pink dragon event works. It's in the middle door when the number is above the right door is 4.