Gambling:
Many forms of entertainment are available aboard a cruise. One of the more popular forms of entertainment is gambling and you will find it offered on several cruise lines. The rules and age requirements do vary between cruise lines. Listed here are the age minimums per cruise line to gamble on the cruise.

Must be 18 or older to gamble in the shipboard casinos:
Carnival Cruise Line
Celebrity Cruise Line *
Fred. Olsen Cruise Line
Holland America Cruise Line
Norwegian Cruise Line
Oceania Cruise Line
Regent Seven Seas Cruise Line
Royal Caribbean Cruise Line*
SeaDream Cruise Line
(* The Alaska Cruise of these cruise lines require minimum 21.)

Must be 21 or older to gamble in the shipboard casinos:
Crystal Cruise Line
Cunard Cruise Line
Voyages of Discovery Cruise Line
MSC Cruise Line
Princess Cruise Line
Seabourn Cruise Line
Silversea Cruise Line
Windstar Cruise Line

Must be 25 or older to gamble in the shipboard casinos:
Costa Cruise Line

Must be 18 or older to consume alcohol:
Fred. Olsen Cruise Line
GAP Adventures
Oceania Cruise Line
Regent Seven Seas Cruise Line

Must be 21 or older to consume alcohol:
Azamara Cruises
Celebrity Cruise Line
Royal Caribbean Cruise Line

PLEASE NOTE:
Cruises departing from European and South American countries whereas the legal age to consume alcohol is less than 21, the parent traveling with children age 18-20 may sign a waiver to allow them to consume alcohol during the cruise.

Carnival Cruise Line
Costa Cruise Line
Cruise West
Crystal Cruise Line
Cunard Cruise LineDisney
Great American River Journeys
Holland America Cruise Line
Hurtigruten Cruises
MSC Cruise Line
Norwegian Cruise Line
Peter Deilmann Cruise Line
Princess Cruise Line
Seabourn Cruise Line
SeaDream Cruise Line
Silversea Cruise Line
Star Clippers Cruise Line
Uniworld Cruise Line
Windstar Cruise Line
Voyages of Discovery