I also read this info from an article. According to it, there has been a rise in recent years in the number of individuals putting “man caves” in their homes. A man cave is a room wholly devoted to the male head of the household, a haven for the male to rest and refresh from tasteful sofas and pourris. It's not the worst move for home values either, as it can add just a little more to the bottom line comes time to sell the home. You may read here for a full info:
Putting in a man cave will not necessarily hurt home value.