You don't need no stinkin' sofa! Put some nice fluffy cushions directly on the floor. Take that futon cushion off the frame and fold it against a wall. Add pillows and blankets. The options are endless!
Floor poufs from Ikea floor mats What You Need Materials 3 IKEA Rugs Zipper (optional) Filler Sewing Machine Scissors Tape Measure or Yard Stick Tailors Chalk (or something to mark your measurements) Straight Pins