Personally I would recommend Carnival as a great choice. I've cruised them twice before and the crowd on the Caribbean trips seems to be a younger crowd and the dance clubs are usually packed. Can't really say how many other guests will identify as GLBT but its a big ship so usually the odds aren't too bad. On the Carnival Freedom I can tell you I wasn't the only one

lol. So yeah, if you're looking to get away and just have a lot of fun Carnival is a good choice. Really there aren't any bad choices in cruising though, just depends on what kind of cruise you want. Hope you enjoy!!!