How special interest cruises for fans of music, yoga and sci-fi are revamping the industry.

Deborah Weitzmann goes on a blues cruise to find out how the speciality cruise industry works and why it's growing in popularity. She also heads off the ship to find out what happens to on-shore businesses when all the entertainment is on the ship.

Presenter / producer: Deborah Weitzmann Image: Legendary Rhythm and blues cruise; Credit: BBC