Just south of King St W, halfway between University Ave & Spadina Ave.
If coming by subway, exit at either King station or St Andrew station, then take any westbound King streetcar. Exit at John street, and walk south along it. Metro Hall is on the east side of John. It is a large building with glass doors. Go past the lobby and past 2 banks of elevators to reach the escalators (the elevators are sometimes offline in the evening). Then go up 2 levels to reach the third floor.