We will be on Explorer of the Seas in January and will be meeting some other people prior to going through check-in. I have been told that, due to the large number of people in the terminal, it is better to set a meeting place in advance (possibly outside the terminal somewhere). If anyone can recommend a good meeting place, please let me know.
You could arrange to meet right outside the entrance to your check-in area. They had a specific entryway designated when we checked in last week-- I think it was #5, but it might change from week to week. It really isn't that bad at the port-- we met some friends there with no problem, and we hadn't arranged where to meet beforehand.