I agree with potstickers...anything and everything!
We have glider rocking chair with a matching glider ottoman, very nice. We bought it when my wife was breast feeding. Now we just fuck on it.
We have two long leather benches. We bought the first one to function as a coffee table in the family room, but after trying it out when the kids were at school, we went back and bought a second one. It is quite functional at the foot of the bed.
We also have an unbelievable exercise bench in our sexercise room that sees significant use. The adjustable back inclines and reclines to multiple kinky positions. And it looks perfectly innocent because of the dusty dumbbells sitting in the corner.