Considering that there must have been at least 15 million western movies made by Hollywood, it's not surprising that occasionally they tried various gimmicks to set some of these westerns apart. For example, in "The Terror of Tiny Town", all the characters are tiny folks and in "Harlem on the Prairie", everyone is black...including the hero.
While "Outlaw Women" is not an all-women film, it is one where they are in charge of a town and men can only visit if they want to frequent Iron Mae's saloon or if she needs them, such as a young doctor who is brought there early in the film. But some men are out to destroy Mae and they plan on robbing the local bank...the same bank in which Mae has all her money. Then, they hope steal away Mae's saloon and impose male rule! So what is Mae to do? Yep...steal the money first! What's next? See the film...or don't.
This film is one that works provided you don't think too much and just accept it for what it is. In other words, the plot is pretty silly and it's best you just look past this and try to enjoy. And, at least it's in color and looks pretty!
By the way, this film with it's odd feminist message would make a great double feature with "Johnny Guitar"....another film about a female saloon owner who is twice the man of anyone else in the movie!