On the Carnival ships such as Sensation, Ecstacy, Inspiration, etc. there is a unisex bathroom that is just below the adult only area (Serenity) that is perfect for a quickie at night. It is not in the main path of most guests and it is not even obvious it is there. Used it many times on cruises where I didn't have privacy because of a roommate. There are no cameras in the bathroom! Have fun and remember, "what happens on a cruise, stays on a cruise"