In one of the school's longest-lasting traditions, begun in 1975, at midnight before the Organic Chemistry exam—often the first day of final exams—the Columbia University Marching Band invaded and briefly occupied the main undergraduate reading room in Butler Library to distract and entertain studying students with some forty-five minutes of raucous jokes and music, beginning and ending with the singing of the school's fight song, "Roar, Lion, Roar". After the main show before a crowd that routinely began filling the room well before the announced midnight start time, the Band led a procession to several campus locations, including the residential quadrangle of Barnard College for more music and temporary relief from the stress of last-minute studying.