November 16. I thought to myself," says SHUFFLE leader Eliran Avni, who came up with the concept for his unique classical ensemble one day when his mp3 player flipped between the Pretenders and Prokofiev, "'How incredible it would be to perform a concert...where the entire program would be based on these extreme stylistic juxtapositions.'" Thus, when the Rhinebeck Chamber Society presents the unit of piano, oboe, violin, soprano voice, clarinet, and cello this month at the Church of the Messiah, it will be the audience members, and not the performers, who will program the set from a song list that includes everything from "Stravinsky to ska." $35 ($5 students under 23; children under 13 are free). 3pm. Rhinebeck. (845) 876-2870; Rhinebeckmusic.org.