You can charter a luxury cruise ship -- or just part of a ship -- for a very fabulous birthday party, for a corporate meeting, for a sales incentive or for whatever else you might be thinking.
Some of my favorite lines and ships for such events are:
Sea Dream | Their 2 small ships are perfect for either a partial or full charter. You can talk over an entire deck or the ship.
Seabourn | Perfect also for either a partial or full ship charter -- or even reserve 10 to 20 staterooms (they're called suites) for a good discount. The ship has several meeting room on centrally located Deck 5.
Regent Seven Seas Cruises | The only cruise line in the luxury market that includes almost everything including shore excursions, they're 3 ships are also perfect for partial and full ship charters.
Crystal Cruises | Top all-inclusive quality and a larger size (but just about 1,000 guests) makes Crystal Serenity and Crystal Symphony ideal - and a great value - for larger groups and incentives. Their research indicates that their per diem is $425.75 a day vs a luxury 5 star resort at $654. Crystal's meeting and incentive package includes: in-stateroom bar setup, wine served with dinner, onboard gratuities, bottled water-sodas & espresso drinks, private cocktail reception with butler service, audio-visual equipment and coffee break.