It is a very popular activity. I am not sure whether or not rock climbers actually participate, but other people get a charge out of it. I guess that would be like Tiger Woods playing miniature golf!
In addition, I got the opportunity to tour some of the ships that have had a make-over and they are looking really good. They did an especially good job on Majesty's show lounge.
Royal Caribbean is working more and more toward making their ships a destination in themselves.