you are not suffering a lack of enthusiasm. you are simply "between projects". there's a subconscious process going on ... your brain is gathering, sorting, and cooking up some creative juice. ;-)
pick up one piece of fabric; fold it neatly for storage. if that doesn't trigger the instinct to grab and fold the rest, then just wait to fold another one tomorrow. one a day is better than none a day.
who cares whether the studio gets straightened first or the urge to quilt again comes first? either way you're doing something that will make you feel good. ;-)