he managed to find a spouse interested enough to marry him. That's already 10 steps above many internet dwellers as of late. People who want to seem "not dull" for that exact goal.
I also did read the piece and recognize this "Dull man's club" is anything but. It's simply a tongue and cheek name for niche hobbies. I'm sure the hackers of the 80's/90's would have fit right in.
We sadly became more dull overtime in comparison as our hobbies all converged into the same few things. And even those few things could be interesting, but hobbies became so shallow. we watch TV but often don't analyze and critque it. We eat food but don't truly taste and savor its flavor. Being "dull" in my eyes means not truly interacting nor resonating with the things you do in your life.