Muster!

This seem like an annoyance but trust me it is necessary and quick to do.
After you have boarded the ship you will receive information that there will be a Muster drill.
This is a safety drill designed in the case of an emergency to assure everyone will know what to do... where and to whom to report. My family actually anticipates it with the excitement knowing that when it is over the fun begins and nothing else will be expected of you for the rest of your voyage.