I'm not aware of any totally informal cruises with Fred. Olsen. However, on all their ships except perhaps the "Black Prince" there is a casual restaurant with no dress regualtions which can be used.it's a pity to miss the formal nights for it can be a lot of fun and the menus are even better than the normal and that is saying something.
As a regular on FOCL I do not know of any totally casual cruises. On formal nights on all of their ships except the Black Prince there are alternative dining options in restaurants with limited dress codes.It seems a pity to miss the formal evening for the menus are even more attractive if that is possible. Try this cruise line. i don't think you will regret it.