Hello al! If you're a fan of massage on the cruise, you can get a deal for a 90 minute massage for $100 if you attend the "Ladies Pamper Party". This is the cheapest rate I've ever found for the 90 minute massage, for basically the same price as the 55 minute massage.
If you're a male, go to the Ladies Pamper Party. It is not legal for Carnival to turn a male away, including in their own corporate policies, they have to welcome men as well. So just go to it as well.
Cheapest massage rate we've found.