You can also make reservations online before you sail. On NCL's website, log into your MyNCL account and select your vacation. You should see the option for shore excursions, dining & entertainment. The dining and entertainment options will be available 45 days (55 days if you are staying in a suite) before your sail date.
The dinner and entertainment reservations are slightly different. When you make the dinner reservation, you only need to specify the number of guests i.e. 6-8 guests. You will need to pay the cover charge online at the time of reservation. For entertainment reservation, the reservation can only be done for the guests staying in your stateroom. You will need to log into each account (one per stateroom) and make the reservation. You could call NCL and they should be able to make the reservation for all staterooms provided you know their reservation details.
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Each party needs to make their own reservations.
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