Who was it who said, "Better to keep your mouth shut and let people think you a fool..."? Based on the You Tube videos I just found when searching for Sea Chanters, I do have to say that they appear far less gay that TIB - no jazz hands, sequins, tight trousers, man makeup or glittery microphones in sight. Plus, they appear to actually embrace Navy heritage, which I think is a good thing (although I don't get why they are singing an 18th century English nursery rhyme in one clip).
Of course, they may have traded their starched uniforms for sequins and I just don't know it; and I still wouldn't go and see them myself, so it is all rather academic.