Are you sure?
The table leg is probably removeable to allow you to put the table between the setees, then re arrange the cushions to make a bed.If no one has removed the leg for some time, the parts are probably corroded together, If the leg is a stainless steel pipe type, try to put upward pressure on the table while someone taps the metal socket with a hammer, or, remove the table from the leg, and try to separate the pieces, if you can remove the leg from the floor socket, do so, if not, remove the screws that hold it, then spray a WD 40 type produce on the joints to allow them to come apart, after they do come apart, clean the joints, and lightly lubricate them before re assembly.Best of luck!