Actually dress codes vary from cruise line to cruise line. Here is the dress code of princess.
Princess makes it easy to know what to pack and what to wear when you're dining onboard. http://www.princess.com/learn/answer...eave/bring.jsp
There are two designations for dress codes: Smart Casual and Formal.
Smart Casual Evenings:
Passenger attire should be in keeping with what would be worn to a nice restaurant at home. Inappropriate dinner wear such as pool or beach attire, shorts, ball caps and casual jeans (with fraying and/or holes), is not permitted in the dining rooms. Shoes must be worn.
Evening gown, cocktail dress, or elegant pant suit for women
Tuxedo, dark suit or dinner jacket and slacks for men
Now my question for the group is if you have dressy jeans dark color and no holes wouldn't it be okay on Smart causal evenings?