Streeterville? I can tell you all about it. My favorite Italian restaurant is the Coco Pazzo Cafe at the corner of Ontario and St. Clair:
http://www.cocopazzocafe.com/ If you like Indian food, Indian Garden at the corner of Erie and Fairbanks is excellent (the Gobhi Gulistan and Maharashtrian-Style Farsi Bhaji are among my favorites):
http://www.indiangardenchicago.com/ For traditional Chicago pizza, there is a Gino's East on Superior just east of Michigan:
http://www.ginoseast.com/ If you like Middle Eastern, Sayat Nova is great Armenian food on Ohio, just east of Michigan:
http://www.sayatnovachicago.com/ And finally, if you like a little Chinese fusion, you should definitely try Republic at Ontario, west of Michigan, next to Lawry's:
http://www.republicrestaurant.us/
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian