CHICAGO a cappella Holidays a cappella Dec. 8-17: Chicago, Oak Park, Naperville, and Evanston Maximize your merriment this holiday season with songs you know and love, sung by the jolliest group of fiercely talented singers in town. Tickets: www.chicagoacappella.org | 773-281-7820 CHICAGO a cappella Holidays a cappella Dec. 8-17 : Chicago , Oak Park , Naperville , and Evanston Maximize your merriment this holiday season with songs you know and love , sung by the jolliest group of fiercely talented singers in town . Tickets : www.chicagoacappella.org | 773-281-7820