Princess Cruises, a favorite with many upscale travelers, has virtually doubled its fleet in the past three years. Casinos aboard Princess ships offer all of the popular table games with Las Vegas style rules including craps, roulette, blackjack, Caribbean Stud, Let It Ride, and Three Card Poker.

The Princess ships also offer a variety of slots including video poker and novelty machines -- many of which have progressive jackpots.

Princess passengers may charge up to $1,500 per day up to $5,000 per cruise to their onboard account for casino use. A passenger who wishes to exceed this amount -- or to request a higher than normal limit at the blackjack table -- is required to complete a form that can be obtained in advance from Princess. Any casino cash advance is subject to a 3% surcharge.

Members of the Ocean Players Club, which was pioneered on Carnival Cruise Lines ships, can be rated when playing table games in Princess cruise ship casinos, and earn points that can be used for discounts on future cruises or cash back rewards. However, the Ocean Players Club slot system is not yet available in Princess cruise ship casinos.