My answer may be a different slant....
My REAL man-cave at home has NOTHING at all to do with golf! Juke Box, Pool Table, Dart Board, HD Tele, with all things related to rock-n-roll, muscle cars, 50's diners, nawlins and such. Purposely set up that way. However...
my den/family room down stairs is decorated to look like more of a clubhouse then a den. Golf art, old and new adorn the walls. A glass-top coffee table with 50 years of collectibles (starting with stuff my dad collected) including balls, tees, bag tags, score cards, memorabilia, etc. Shelves full of golf books and other golf stuff. Probably my mosy prized item is the 1966 scorecard from Kasumigaseki Country Club in Japan signed by Nicklaus, Palmer and Player from the practice round they played before filming thye "Big Three" event the next day at Hirono. Only competition card I know of with all three signatures on it.
Then there is my office which most people will tell you is one of the biggest golf man-caves they have ever seen. 30 years worth of design and collecting of a lot of stuff I don't even remember from where it came. Sorry, no pictures, but you are all welcome to stop by when you are in the area.
Lester