Does anyone know how to go about asking one of the photographers to shoot a group of 25? We were hoping to do it on Christmas night (which we assume is a formal night). Thank you.
Absolutely the ship's photographers will take photos for you.
Being formal night they will have set ups with backgrounds along with the Atrium staircase.
You can stand in the lines or I would also suggest trying to set something up with them in advance.
We saw the photographer making photos of different groups up to 30- to 40 persons on the Atrium staircase, the best place in the ship for a group photo. And they are used to make it, because there are many groups on a cruise.