Battlestar Galactica Cruise - Theme cruise celebrating the Battlestar Galactica television shows, featuring actors from both the original and re-imagined series.
Bryant Dance Cruises - Ballroom, swing and latin dance themed cruise groups. Includes upcoming itineraries, roommate finder, and booking information.
Craft Cruises - Specializing in knitting and other crafts-related group and charter cruises. Includes itineraries, pricing, onboard class program, and booking information.
Dance Across The Seas - Country and Western dance cruise from Fort Lauderdale to Western Caribbean aboard the Grand Princess.
Fairwaves Ltd - Organize golf cruises for groups and individuals, across a range of lines.
Home Theater Cruise - Annual conference with presentations and panels about the home theater industry, bringing together manufacturers, dealers, reps, and enthusiasts.
InSight Cruises - Offers a variety enrichment-themed cruises on scientific, cultural and IT topics. Some operated jointly with Scientific American. Includes details of upcoming cruises, interest-based sign-up for future cruise notifications, and tips on how to convince your spouse.
Murder on the High Seas - Murder mystery cruises, offered several times a year. Includes upcoming schedule of events, services and amenities included, and prices.
Quilt Camp at Sea - Organizes multiple quilting cruises each year, with featured guests, lessons and group sessions, as well as an onboard quilt shop. Includes itineraries, prices, and registration form.
Sober Celebrations - Sober cruises for those in recovery from alcohol. Includes upcoming cruises, contact information, tips and resources, and a blog
Vulkon Entertainment - Annual science fiction cruises including SeaTrek (Star Trek theme) and SlayerCruise (Buffy theme), featuring shows' stars and themed activities. Site includes schedule, ship information, prices and booking information.
Luthiers Cruises - Alaska cruise aboard Celebrity Infinity featuring famous classical guitar makers. One-off event, August 2008.