OKOBOJI — The Spirit of Harmony Chorus will present pre-show entertainment under the awning at 7:30 p.m., Friday, July 15, before the Okoboji Summer Theatre production of An Inspector Calls. Celebrating their recent regional first place competition results, the Spirit of Harmony Chorus is excited to share their harmony with OST audiences again. The chorus, a chapter of Sweet Adelines International, is directed by Judy Weipert and assistant director Marcia Klingbeil.