of this style. Couples may frequently dance in the promenade position, depending on local preferences. Within Country Western waltz, there is the Spanish Waltz and the more modern (for the late 1930s- early 1950s) Pursuit Waltz. At one time it was considered ill treatment for a man to make the woman walk backwards in some locations. In California, the waltz was banned by Mission priests until 1834 because of the "closed" dance position. Thereafter a Spanish Waltz was danced. This Spanish Waltz was a combination of dancing around the room in closed position, and a "formation" dance of two couples facing each other and performing a sequence of steps. "Valse a Trois Temps" was the "earliest" waltz step, and the Rye Waltz was preferred as a couple dance. In contemporary ballroom dance, the fast versions of the waltz are called Viennese waltz as opposed to the Slow waltz. In traditional Irish music, the waltz was taught by travelling dancing masters to those who could afford their lessons during the 19th century. By the end of that century, the dance spread to the middle and lower classes of Irish society and traditional triple-tune tunes and songs were altered to fit the waltz rhythm. During the 20th century, the waltz found a distinctively Irish playing style in the hands of Céilidh musicians at dances. International Standard Waltz has only closed figures; that is, the couple never breaks the embrace. The American Style Waltz, part of the American Smooth ballroom dance syllabus, in contrast to the International Standard Waltz, involves breaking contact almost entirely in some figures. For example, the Syncopated Side-by-Side with Spin includes a free spin for both partners. Open rolls are another good example of an open dance figure, in which the follower alternates between the lead's left and right sides, with the lead's left or right arm (alone) providing the lead. Waltzes were the staple of many American musicals and films, including "Waltz in Swing Time" sung by Fred Astaire. The Scandinavian Waltz, performed as a part of Scandinavian folk dance, can be fast or slow, but the dancers are always rotating. The Peruvian Waltz is called and recognised in Peru as vals criollo. The Mexican Waltz (vals mexicano) follows the same basic rhythmic pattern as the standard waltz, but the melodies reflect a strong Spanish influence. Mexico's Juventino Rosas wrote "Sobre las Olas" or "Over the Waves”. The