Actually, I don't particularly like sharing a room even with someone I know. As far as the the group you are taking about, for reasons that are perfectly obvious, that doesn't do anything to help me. You also, in the article, didn't say anything about how they are getting around the singles suppliment, other than by sharing rooms.
I kind of assume you're in the travel industry, and not just an enthusiast. If so, do you know if anyone has worked on the cruise lines to do anything about this? I would think they'd get alot more business from singles if they eliminated, or at least toned down the suppliment. Maybe someone from Cruisemates or some other organization should approach them about this.