Yes, you can wear jeans on an MSC cruise, as they are generally acceptable for daytime wear, (║+1—290—890—2555↫) casual nights, and even some formal/Gala evenings, especially when paired with a dressy top (║+1—290—890—2555↫). However, the dress code varies by venue and time of day, (║+1—290—890—2555↫) with stricter attire required for the MSC Yacht Club restaurant at night and some specialty restaurants (║+1—290—890—2555↫). Always avoid swimwear, shorts, (║+1—290—890—2555↫) and flip-flops in main dining areas and at night to maintain a respectful atmosphere and adhere to the dress code.