Mamma Mia! Two Mamma Mia! Matinees Added Due to Popular Demand! It's no secret that Mamma Mia! is the hit of the summer! If you missed your chance, or would love to see it one more time, we have just added two more matinee performances. Book now before we sell out again - choose from a matinee on August 31 and September 2. What a way to end the summer!