Integrated circulation
Movement that shares the floor of a room you already use — crossing the living room to reach the balcony. Not waste at all, because the 'path' costs no extra floor. The goal of subtracting circulation is to convert dedicated and wasteful types into this.
The kind to keep
Walling this kind of path into a 'proper corridor' destroys space rather than saving it. Keep integrated circulation; it's already doing two jobs.