I don't think that there is anything as equally as special as Bibbidi Bobbidi Boutique for boys. I looked into it too, but couldn't find anything. At MGM, there is the Jedi training that my boys loved, but it is not exclusive for boys and there is no guarantee that they will be picked for the training.
My Dh and I have discussed this several times. We think Disney needs to find something exciting for the boys. I have a daughter too, so I am not trying to exclude girls, but there are so many things attractive for the girls and only a few for the boys. A character dining experience with the characters from Star Wars, the Power Rangers, or even the pirates would lots of fun for boys, and maybe it would ease some of the pain the boys experience while dining with the princesses for their sisters.