[2] Like many collegiate a cappella groups, they are rooted in traditions tied to certain social events, attire, or means of address.
The Crosbys usually perform in jeans and blazers; their alumni song — a collegiate a cappella tradition in which alumni present at the concert may join current members to sing — is "Strike Up the Band" (aka Jack).
They undertake a two-week tour each winter, succeeded by The Jam, a large performance at the end of each semester.
The Crosbys typically compete in the ICCA competition every few years, as do many prestigious collegiate a cappella groups.
They have progressed to the national championship round four times in the twenty-five years of the ICCA's existence, performing at Carnegie Hall, Lincoln Center, and winning the trophy during the finals held in 2003 at the Beacon Theatre on Broadway.