Here's another one I saw advertised this evening (Cloud Gate is the silver metallic 'bean' in Millenium Park):

Experience Chicago’s newest holiday tradition…

Caroling at Cloud Gate

On Friday Nights throughout teh holiday season, Millennium Park will be home to the city's newest holiday tradition - Caroling at Cloud Gate, the city's newest icon, to hear the beautiful voices of a variety of choral groups, followed by a holiday sing-along.

Caroling at Cloud Gate runs Fridays from November 24 through December 22. The choral performances begin at 6pm; the sing-along begins at 6:30pm.

Each evening, both the choristers and those singing along will be invited to hold holiday candles. The reflections of the candles will twinkle in the stainless steel of Cloud Gate, creating a magical holiday scene in the center of the city.

Complimentary coffee and hot apple cider, provided by Caribou Coffee, will be avaliable each evening.

After Caroling, guests are encouraged to skate at Millennium Park's McCormick Tribune Ice Rink, one of the most popular winter destinations in the city.