Most cruise lines have their own loyalty rewards program. They range anywhere from free meals in a select restraurant, a cabin upgrade, or even a free cruise if your point level is high enough.
They also offer invitation only parties to the guests that belong to their club or rewards program. Check your favorite cruise lines web site to see how to join. Some require that you take a cruise with them, before letting you join.
Other cruise lines offer credit cards (one example offered by HAL see the link below) that reward you with points on all of your purchases on anything you buy all year long, you can use the points earned for credit on a cruise.
https://www.barclaycardus.com/apply/Landing.action?campaignId=1313&cellNumber=9
They also offer invitation only parties to the guests that belong to their club or rewards program. Check your favorite cruise lines web site to see how to join. Some require that you take a cruise with them, before letting you join.
Other cruise lines offer credit cards (one example offered by HAL see the link below) that reward you with points on all of your purchases on anything you buy all year long, you can use the points earned for credit on a cruise.
https://www.barclaycardus.com/apply/Landing.action?campaignId=1313&cellNumber=9