If you have a special interest there is more than likely a theme cruise that features it. Below is a guide to theme cruises:

Adults Only Cruise:
Celebrity Cruise Line

Celebrity Cruise:
Celebrity Cruise Line

Film Festival Cruise;
Crystal Cruises

Food & Wine Cruise:
Costa Cruise Lines
Crystal Cruises
Cunard Line
First European Cruises
Orient Lines
Radisson Seven Seas
Seabourn Cruise Line
Windjammer Cruise
Windstar Cruises

Murder Mystery Cruise:
Crystal Cruises
Cunard Line
Royal Caribbean Cruise Line

Broadway/Theater Cruise:
Crystal Cruises
Cunard Line
Holland America
Orient Line
Seabourn Cruise line

Health, Fitness & Yoga Cruise:
Costa Cruise Lines
Crystal Cruises
Cunard Line
Holland America Line
Radisson Seven Seas
Seabourn Cruise Line
Star Clippers
Windstar Cruises

Motivational Cruises:
Costa Cruise Lines
Crystal Cruises
Cunard Line
Holland America Line
Orient Line
Radisson Seven Seas
Seabourn Cruise Line
Windstar Cruises

Music Cruise:
Crystal Cruises

Nascar Race Cruise:
Carnival Cruise Lines

Personal Finance Cruise:
Costa Cruise Lines
Crystal Cruises
Holland America Line
Radisson Seven Seas

Literary/Fine Arts Cruise:
Cunard Line
Radisson Seven Seas
Seabourn Cruise Line
Windstar Cruises

Sports Cruise:
Carnival Cruise Lines
Costa Cruises
Cunard Line
Seabourn Cruise Line

Golf Cruise:
Carnival Cruise Lines
Clipper Cruise Line
Costa Cruise Lines
Cunard Line
Royal Caribbean Cruise Line
Seabourn Cruise Line
Silversea Cruises

Spiritual/Gospel Cruise:
Costa Cruise Lines

Classical Music Cruise:
Crystal Cruises
Cunard Line
First European Cruises
Radisson Seven Seas
Seabourn Cruise Line
Silversea Cruises

Big Band/Swing Cruise:
Crystal Cruises
Cunard Line
First European Cruises
Holland America Line
Radisson Seven Seas
Seabourn Cruise Line

Country Western Cruise:
Holland America Line

Jazz, Rhythm & Blues Cruise:
Cunard Line
First European Cruises
Star Clippers

50's Sock Hop Cruise:
Holland America Line

Singles Cruise:
Carnival Cruise Lines
Windjammer Cruises