the_producers is a fan community for the 1968 film, Broadway show, and 2005 movie musical by Mel Brooks. If you're a fan of any of those incarnations or any of the actors that are or have been involved in it, feel free to join the community.
As far as what goes for posts, you can post anything from pictures, icons, reviews, experiences, etc. involving the movies or show to anything involving the actors, or Broadway in general. Pretty much anything goes, as long as it's along those very general lines, and as long as it's nothing hateful or insulting.