This cocktail hour is a perfect opportunity for Chicago area young professionals to meet up after work to drink, eat, and hear a little music. The event includes a short opera performance by COT Young Artists, Leila Bowie and Martin Woods. $25 per person in advance and $35 at the door (Admission includes unlimited beer/wine and light appetizers). Chicago Opera Theater’s Opera Underground is aimed at young professionals ages 21 to 45. Rock Bottom Brewery, 1 West Grand Ave, Chicago