Have a hot slice, a cold brew and listen to some seriously impressive singing at this edition of Opera Underground, a casual event that brings the art of opera to the masses. This time guests will be treated to a preview of Norma performed by Tulsa Opera Studio Artists, as well as popular opera arias and musical theatre favorites. Learn more about Opera Underground <a href="http://www.tashadoestulsa.com/2010/06/opera-underground/">here</a>.