If you are a steak lover I suggest trying the Porterhouse at least one night. Its incredible. We try to eat at the Steakhouse at least once during a cruise. I think allowing you to get the food served there on ships that don't have one is a fantastic idea. Not that the main dinning room food is not excellent, but the steakhouse steaks are another notch above it.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007