What to wear/dress code

What should I wear on my cruise? → Will there be a dress code on my cruise? → How many formal nights will there be on the cruise? → What are my options if I don't want to dress up for formal nights? → Ambassador Cruise Line dress code → Azamara Cruises dress code → Costa Cruises dress code → Celebrity Cruises dress code → Cunard Line dress code → Fred. Olsen dress code → Holland America Line dress code → Marella Cruises dress code → MSC dress code → P&O Cruises dress code → Princess Cruises dress code → Norwegian Cruise Lines dress code → Oceania dress code → Royal Caribbean dress code → Virgin Voyages dress code →