Theatre Orleans is a small amphitheater with bench-type seating. The show changes from time to time, but all have a latin feel and feature live singers and dancers mixed with popular Disney characters. These are high-energy shows that will appeal to kids and adults alike.
Like all shows at Tokyo Disney Resort, if you want a seat you'd better get there early. The Theatre Orleans is a little different however, in that if you arrive after the show starts you can stand up in the back (outside the seating area) and watch the show; most other venues don't let you do this.