At TheSpace@SymposiumHall.

Symposium Hall, Hill Square, Hill Place, off Nicolson Street (at KFC), EH8 9DR. [Fringe Venue: 43]
EH8 9DR

Hill Square is off Hill Place.  KFC on Nicolson Street, opposite Nicolson Square, is on the corner of Hill Place.

Hill Place is on the direct route from Pleasance Dome & Gilded Balloon to Pleasance Courtyard.