John Hancock Building
351-409 Stuart St, Boston, MA
Not yet rated
Directions: in the basement / downstairs from the theater, directly across from the wall covered in mirrors + the doors leading to the large room, it's labeled as a men's bathroom but there's a lounge inside + a single stall restroom with a lock (on the left) as well a stall (to the right) next to the urinals
Comments: they labeled it as gender neutral w/ a piece of paper, so i'm unsure if it's always available like a gender neutral bathroom, but it's worth a shot