Oceania Cruises mid-sized ships -- Regatta, Insignia and Nautica -- have small but lively casinos, offering table games including blackjack and roulette and more than 40 slot machines. None of the casinos aboard Oceania ships has a craps table.

An unusual feature, which some may find very appealing (and others very frustrating), is that smoking is not allowed anywhere in the casino on any of the Oceania ships.

The casinos on all three of the Oceania ships are operated by Century Casinos, a Colorado-based casino company that owns casinos in Colorado and South Africa.

The company also operates the casinos on Silversea cruiseships and ResidenSea's The World.

While the casinos generally appear to be adequate for ships of this size, feedback we have received suggests they are more oriented to the casual rather than serious players.

Cruise-Casinos.com has not yet had an opportunity to evaluate these casinos.