Reading Time: 3 minutesMamma Mia! at the King’s Theatre in Glasgow is the kind of show that reminds you exactly why  musical theatre is so special. It is joyful, energetic and completely unapologetic about having a good  time. From the moment the first ABBA song begins, the atmosphere in the theatre changes, and by  the end, there was very little chance of anyone leaving without a smile on their face.