There should be at least 1 court on every ship although sometimes they are not in the best condition..
CCL Valor : September 2013
CCL Breeze : April 2013
RCCL Oasis : September 2012
RCCL Freedom : April 2012
CCL Destiny : April 2011
CCL Valor : September 2010
CCL Victory : March 2010
RCCL Adventure : September 2009
RCCL Monarch : March 2009
RCCL Mariner : September 2008
CCL Liberty : March 2008
CCL Valor : July 2007
CCL Celebration : March 2007
CCL Elation : March 2006
CCL Fantasy : October 2005
Yes there was but not what your thinking. At the time I sailed, it was a small area enclosed in netting. It was not a full court. My best guess was that it was maybe 1/4 court size. The net was one that they would wheel out. This may have changed since then but this is what I saw.
Life is too short to let the ship of your dreams sail without you.
Carnival Destiny Feb. 2006
Carnival Fascination Feb. 2007
Royal Caribbean Grandeur of the Seas Feb. 2008 The DTW & MsBJ tour
Carnival Valor MsBJ and Dina Feb. 2009
Carnival Glory MsBJ and Dina Feb. 2010
Carnival Dream MsBJ and Dina Feb. 2011