Check out this new blog, Hollywood Boys Club, that compiles examples of "men only" in Hollywood. Current examples include the all male writing staffs of television shows like Real Time With Bill Maher and the all male directors of shows like Burn Notice and Magic City.
They also touch upon the staggering numbers only male directors directing films on studio slates. Having this kind of information all in one place is hugely important and seeing the numbers of "men only" continues to illuminate the deeply embedded sexism in the industry.
You can submit your own "men only" examples here.