As an aspiring writer, I subscribe to Drama-logue (and many other entertainment periodicals)... I have seen Crystal (and many other Cruiselines) advertise for show talent in there! Good luck and maybe we'll see you in one of their new shows on the Serenity!
They hire in Las Vegas, I think. The production company that does the shows is based there. Kirk Fredrick is the head of the entertainment division, and he works out of their LA headquarters. You can get the necessary addresses on their website.