It is true, Cosmic Ray's stage IS a performance stage. The early years of WDW that was actually called the Tomorrowland Terrace. You can find the nowadays version is currently out on the right of Tomorrowland. On January 1st, 1994, it was remade to "Cosmic Ray's Starlight Cafe" which is what we have today. So it was often back then (I think.) to have a platform rise and reveal performers playing songs along with Mickey, Minnie, Donald, and Goofy. In it's refurb, you would think they destroyed the mechanism along with the stage. Well, that's incorrect! Sadly though, they only use it for events such as Halloween, Christmas, etc. Cast Members would get on stage underground in the utilidors,(I'm no CM.) and rise up, and rock out!