Set up a humidifier in the room with the static-causing furniture. A dry environment has the potential to cause more static electricity than an environment that has more moistness in the air. Place the humidifier next to the furniture that is causing the static problems, and turn it on for a few days to see if the static is discharged.
Cover the furniture with fabric softener anti-cling sheets -- the same ones you use in the dryer for your clothes. Anti-cling sheets against the fabric of your furniture may be able to discharge and extract the static so that it no longer lingers on the piece of furniture.
Press a wire hanger against the furniture and slide it back and forth. Since metal or wire is used to deactivate static on a person and on clothing, it might be able to work on your furniture.
Mix 1 tablespoon of liquid fabric softener in a plastic spray bottle with 1 cup of water. Shake the mixture up and spray it -- using a mist setting on the bottle -- over the furniture. Lightly spray the surrounding carpet as well, since its fibers could be intensifying the static from the furniture.