Totally with you on that last point. I think what set off my alarm with yoga in particular is that while it is a fantastic meditative and healthy activity, it's often very sexualized.

In reading more about it on their site and an AMA someone did about their experience five months ago, it's a mandatory morning activity they've been doing for awhile now and there don't seem to be any complaints (though a blog, http://newbietoruby.wordpress.com/, says that while he enjoys it, it took two hours out of his day and sometimes stressed him out).