Six people who used to be the best of friends at University, but have subsequently grown apart, are all mysteriously invited to take part in an escape room in the Caves at the Edinburgh Fringe. They used to love solving puzzles together, but no one knows why they are suddenly here to solve one last mystery, or do they?   In ‘Escape Room: The Musical’ by Grown Up Playhouse Productions, we see the six friends, joined by Pierre, an enigmatic French man who doesn’t seem to know w