No they are not if you want to enjnoy your dinner with the rest of civilised society. As Leonard says if you want to eat in the Lido you will get away with it, but may still feel underdressed in the theatre or bars. While a DJ is not necessary, even on formal nights a lounge suit will do, every man looks sexy in a tux, Try it you may be surprised.
Not really. Just off this ship and only once saw a pair of jeans in the evening! The ladies were all very dressy even on the 'informal' nights.
Probably depends where you want to eat.
i had jeans on all the time while on the celebration last summer and so did lots of people but then again we only was eating in the 24hr lido restaurant. where mostly the the food was great.
but if you were to be eating in a waiter service restaurant i dont think you would get in.
Just got back from New Year cruise my son (16) insisted he wasnt going to wear tux so bought him some cheap black trousers (Tesco) and borrowed a black blazer and he wore this on the formal nights with a shirt and tie he did wear jeans but only in the Lido restaurant or in evening after meal. Take a suit or pair of trousers and shirt for the Meridian and Zillis restaurants and just change into jeans once you have eaten.