You can also sing all four service theme songs together: Anchors Aweigh, Off We Go into the Wild Blue Yonder, The Caissons Go Rolling Along and the Marines Hymn (from the halls of Montezuma...). I'll admit this is probably not something you'll want to do.

I saw it done with about 80 people in the audience. The leader made up big newsprint song sheets for each song, divided the audience into four groups, practiced each song once and let 'er rip. A good time was had by all.