So becoming friends with the crew is not allowed? That suck, have to tell our friends who are crew that we are not allowed to be friends. They can easily get to know people and interact with them- they are not on duty 100% of the time.
Let alone the repeat cruiser crowd- he sees a lot of passengers many times as they repeat cruises.
Do you like the Aqua show? Normally, on Oasis class ships, they have the top tier party at the Aqua Theater, and for us has always had a short diving show as part of it.
Otherwise, it's some free alcohol and talk about cruising.