How about spending an evening at sea catching a show hot from the West End or Broadway? Or watching a dazzling acrobatic display or inspiring dance performance? Cruise lines boast an incredible array of live shows these days, performed in theatres with the latest technology, so there's bound to be something that floats your boat. You can even enjoy unique venues such as ice rinks, swimming pools and atriums. Here are some of the impressive acts you can watch live on cruise ships.