The official description from the Limited Time Magic site is as follows:
Kick up your boots for Halloween week at Magic Kingdom park where you can find all sorts of spirited fun in Frontierland! From 11:00 AM to 3:00 PM, head to the Diamond Horseshoe Saloon—re-dressed in the guise of "The Happy Haunted Horseshoe"—and grab a snack or a Halloween-inspired goodie as an ethereal group of entertainers takes a break from pushing up daisies to delight you with their tricks and treats. This is your chance to join hostess Miss Betty Blue as she calls forth haunting harmonies from the Cadaver Dans, the piano-playing Dearly Departed Stan and everyone's favorite morbid magician, Abner Cadaver. So be on the lookout—miss this offering from Limited Time Magic and you may never rest in peace!