https://youtu.be/uK-2JOosGdQ
Every Sunday night, BYU students gather in a tunnel by the Marriott Center to sing hymns. The official BYU Tunnel Singing club was started in 1989 as small group of students. 100 to 400 people now attend each week. The BYU Tunnel SingingFacebook pageposts times for Tunnel Singing 'sessions' in English, Portuguese and Spanish.