Yes, I've played poker on a cruise ship, but it wasn't Royal Caribbean. It was on the "one ship cruise line", Regal, and it was about 8 years ago. They are still sailing out of Ft. Lauderdale, but it's only to the Bahamas and back. Don't know if they still have poker.
Grandeur OTS b2b2b January 2015
Grandeur OTS b2b2b January 2016