I'll give the comedians a bit of a pass. Usually they do two shows at two different times to accommodate traditional diners eating at the two different seatings. On Ruby these shows were also held in the smaller Explorers Lounge and there is not a lot of room anyway.
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014
Star Clippers: Royal Clipper 2015