From the RCI website:
There are three distinct types of evenings onboard: casual, smart casual and formal. Suggested guidelines for these nights are: Casual: Sport shirts and slacks for men, sundresses or pants for women
Smart Casual: Jackets and ties for men, dresses or pantsuits for women
Formal: Suits and ties or tuxedos for men, cocktail dresses for women
Yes ...most people still dress up and why not? Do you not take a pride in your appearance? Men really do look smarter in a DJ and ladies always look at their best in something dressy. Long may it continue. Do the ladies ever say "Shall I bother to put make-up on" .....Ida Dow.
See! the Downs are so rude! Why cant you just answer the question in a civil way.
Thanks to everyone that submitted their answers to my question, I am really looking forward to my holiday and was not sure what to pack, so the answer from the Downs from Southampton was indeed rude - thanks to "Dolan" from Washington - Mrs Purvis Hornchurch.