When we first bought our house, our basement was unfinished. My DS, his friend and my DH set about framing it, insulating and sheetrocking it. I primed and painted everything and it was to be the "man cave". It is a huge basement, with a big storage area to boot. I requested an area for my table and machine. It's a nice size area and I've purchased some antique armours and had my father refinish them and fit them with shelves. I have a dehumidifier in the summer (which helps keep the basement cool) and we installed a pellet stove which I fire up in the winter when I'm downstairs.
The club room portion has a bar, pool table (when covered I put my huge cutting mat on it and use it for a cutting table). There are a couple couches, and I have 3 small tables with chairs. Every other Wednesday night I have anywhere from 4 to 11 women in my basement quilting. It's a great space, with lots of uses, but mostly it's my quilting hide-away.
I enjoy being in the basement quilting. If I'm upstairs where DH or DD can see me they are always wanting me to do things for them. When I go down the stairs, they leave me alone. There is an unwritten rule about that...LOL. Oh, and DH gets his "man cave" back when we do football stuff or have parties. So it's a double duty area.