I don't know if they have any tables larger than 10. Plenty of round six-tops next to each other. Perhaps they will seat you in a cover with two round tables. Did you book as a group?
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Alaska 2014 - haven't picked a cruise yet
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012
Celebrity: Summit 2011
Princess: Ruby 2010, Caribbean 2013