I wish. I'm working on it. It must have a top-of-the-line sound system and a small library. When I'm too old to travel I'd like to spend time there writing a book. Check out these ideas. https://sebringdesignbuild.com/incredible-man-cave-ideas-that-will-make-you-jealous/
I can lock out everyone since I live alone. My guy is here about half the time. When I was rearing my children I sometimes went into my bedroom andf locked the door. They wouldf immediately have an emergenvcy. :)