**PREFERRED** Dining table/wall shelf for Yoga space/dining room. Chairs would be needed, or bar stools pulled from counter and used. Mirror or artwork on wall above table? Fold out table -- could probably DIY this and make an awesome craft/fabric table.
A small space idea, like a tree house in your room. Utilize all space with shelf stairs up to the bed box. Get a closet too and all of it up off the floor space. Great for a boys room. Put a BB Net on the bed and voila! they can play indoors.