Speak with Dulnea Ralaal in Balmora, Eight Plates on the topic "entertain the patrons". She will give you options to tell jokes, dance the high-kick, play the drum, play the lute and sing, or juggle.
Official Plugins will not invalidate your old saved games. If you save your game while this plugin is loaded, you may encounter error messages when you reload the saved game without the plugin. But you will be able to continue on with the original game.