Those of you heading to Millennium Park this evening to see Don Giovanni might want to head to the Artisan Cellar at Merchandise Mart from 4-6 p.m. this afternoon for a free tasting of Andre Clouet Champagne, which the Artisan Cellar touts as their most popular sparkling selection in recent memory. a member of the Clouet family will be on hand to discuss the champagne. Saturday at Provenance Food and Wine's Logan Square location,......