While at Moe's Homer tells the story about what happened to him in Capital City. One night at a Springfield Isotopes baseball game, Homer started dancing to pump up the crowed. The Isotopes went on to win the game, and Homer got a job as the team's mascot. Soon, Homer got bumped up to be a part-time mascot at Capital City, up along side the "Greatest Mascot There Is", according to Homer, the Capital City Goof Ball. Homer becomes an absolute flop in Capital City and gets fired.
I thought Dancin' Homer was a great episode. Sub-consciously probably because I'm obsessed with baseball, but still, this was an entertaining episode that any Simpsons fan would respect.