Nothing could be more charmingly festive, more seasonally upbeat, more iconically Chicago, than holiday carols sung live beneath the "Bean." In that spirit, we wish you a merry invitation to the city's annual presentation of rousing, workweek-ending rounds of yuletide a cappella. A different group of choristers will sing each Friday evening of the season: the Apollo Chorus on November 28; the Wooten Choral Ensemble on December 5; the Chicago Chamber Choir on December 12; and the Chicago Children's Choir on December 19. Grab a hot cocoa at the Park Grill and join in the holiday cheer.