Harmony Organ & Piano Studio Inc 109 S High St, Zelienople, PA16063 Harmony Organ and Piano Studio, or HOPS, is a school that offers piano, keyboard, and guitar lessons for students age 4…More to adult. Piano lessons are one hour and are semi-private, utilizing individual instruction as well as group playing. Guitar lessons are private and taught on electric and acoustic guitars, as well as bass. Adults may take private lessons for keyboard, piano or organ, which last a half-hour. The school also stocks music books and accessories. Prices and more information can be found on their Web site.