Mine is more of a spare bedroom turned bike shop man cave bike storage area. I'm lucky enough to have a wife that feels and agrees our bicycles should not be kept in the garage. So I get this room
I do all my maintenance and wheel building in this room. Closets are filled with bike tools, wheel tools, spare wheel, parts, and a couple of bikes. To the front of the chair, is my computer table where I store all my cameras, recorders, and create the videos and pics I post in forums etc.