My Undecision Room

This is my office/exercise room, its a long room,  13x 24.5, so im having a problem , don't know what kind of furniture , what size furniture, i have big roll top desk, tanning bed, two end tables, there is a small bathroom in it also, i need some serious help, we moved in july , and this room is a problem for me. please help me .... olene mccoy