Complex sentence: The Auditorium has a balcony with seating for 250 people and has a Conn 651 Organ that was installed which has been played by well known organists including Miss Freida Hall and Arnold Loxam.
Split into simpler sentences: The auditorium has a balcony with seating for 250 people. A Conn 651 Organ is installed which has been played by well known organists including Miss Freida Hall and Arnold Loxam.