We had Palo ressies for Tropical night.
We dressed for Palo and had a wonderful meal. Then returned to our room and changed into our Tropical wear, since we had bought it for the cruise on a earlier trip to Hawaii.
But if you arent up for it you don't need to dress for it. We did go to our regular dinner seating to see our table mates and we had our pictures taken in the atrium with a tropical backdrop. But again, if you are only going to Palos don't worry about it, unless you want to.