Queer revivals of this dance originate from a festival held in Hamburg in 2001. This dance, described as a “sad thought” by one musician, features moves such as tracing figure eights with one’s feet. Rudolph Valentino helped popularize an “American” variety of this dance that added head snaps. A variant of this dance divided into phrases like “cross” and “resolution” are part of the widely taught “eight-step basic” for this dance. Performances of this dance in exclusively minor keys occur in (*) Finland, where the largest festival for this 2/2 or 4/4 dance is held. Accompaniment bands for this dance’s “new” form feature the bandoneón (10[1])accordion. The (10[1])inventor of that form, Astor Piazzolla, also added electric guitar to this dance which originated from the earlier milonga and flamenco. For 10 points, name this partner dance from Uruguay and Argentina. (10[1])■END■ (10[1])