A rec room, or recreation room, is also somewhat different from a family room, as it generally contains some kind of recreational equipment, such as a pool table or pingpong table.

I guess I must I have some sort of weird definition of rec room. Where I'm from, it's just come to mean the large, comfortable catch-all room in the finished basement. It should have a couch in it. Most have a TV, some have a bar, I have seen pool tables (awfully hard to get down the stairs - we had one for a while - my dad had to knock out part of the wall in the stairwell!). Many have 70's style wood panelling on the walls still, since that's when those basements were first finished, and no one puts a high priority on "remodelling" the rec room.