What does "smart casual" mean? What is the typical dress code for evenings that are not formal. Shirt and Slacks? Polo Shirt and khakis? How about on Formal Nights, I heard that a tie is not needed, just slacks, shirt and a sports coat? Sure does not sound formal to me. Are most people is dark suite and tie or dressy casual on formal nights? I am taking a 4 day cruise on Monarch of the Seas from LA to Mexico.