It sounds like a disorienting dream: heavy metal, Melville, modern dance, and nuns pouring drinks. Rafe Wadleigh, a music teacher at a Catholic girls' school in Seattle, adores Mastodon—the prog-metal band whose most famous album, Leviathan, is a 45-minute tribute to Moby Dick. Wadleigh assembled a Mastodon cover band (with one of his students on bass) to play the entire record and invited choreographers to set dances to its 10 songs. The evening is also a benefit for AIDS relief in Lesotho. Says Wadleigh: "This is for the sisters in the trenches." (Pigott Auditorium, Seattle University, 7:30 pm, $15, all ages.)