An all-male choir's rendition of Dancing Queen last night capped off an Illawarra Music Festival hailed as a great success by organisers.The Spooky Men's Chorale performance at Wollongong Town Hall was among the festivals highlights, which also included jazz at Five Islands Brewery, band performances at Civic Plaza and the Sydney Symphony Orchestra's return to the Illawarra.Wollongong Conservatorium of Music CEO Andrew Snell said the festival's success ensured it would return "bigger and better" in two years' time.