I included some non-musical documentary footage at the beginning of this video showing all-day singing etiquette. The Arranging Committee calls Julian, and says he will be followed by Clarissa. Julian is seated where he can immediately move into the hollow square. While he’s calling and pitching the tune, Clarissa (in purple) gets up and heads to a seat where she can immediately move into the hollow square when she is called. Nobody hurries, but no time is lost. This observance of etiquette helps explain how we managed to squeeze 99 tunes into one all-day singing.