It will only be offered 1 or 2 nights and you will not know which night it is, or which night you are assigned till you get on the ship. You can then ask at the steakhouse and they can check for you. Otherwise you will get a letter the evening before telling you when and were to meet.
Conquest 1/8/12 - Western
Breeze 2/16/13 - Exotic Southern
Miracle 8/26/14 - Alaska