My "Estrogen Free Zone" is my bowroom in the basement, which I share with the water softener.
Along with bow racks and buckets full of arrows I have quite a collection of memorabilia on display: pictures of buddies at shoots and hunts, deer sheds, skulls, groundhog teeth, out of state licenses, Pittsburgh Penguins terrible towel, my journals, Sponge Bob and Far Side cartoon characters, special arrows that meant something to me at one time, etc.
My "Zone" was a great place to hide when my wife and two daughters wanted to watch Lifetime movies and child birthin' shows!