Pro tip, if you take a trip with friends and book the two adjoining family bedrooms, the door that separates them is 'locked' using what equates to a fireplace

Pro tip, if you take a trip with friends and book the two adjoining family bedrooms, the door that separates them is 'locked' using what equates to a fireplace key. I keep one in my luggage so I don't have to ask the attendant to lock/unlock the door.