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I was interested to read this question as I have always wished that the entertainment programme was advertised before you boarded the ship. Fred. Olsen do advertise the entertainment when they have "big names" on board but not on most of their cruises. You might ring the Ipswich office but I would be surprised if they were able to help.
Most of the cruise reviews say the entertainment was good with one exception who suggested you bring a good book with you. On one there was a reference to a jam session with the Captain and one of the entertainment staff.