Private dining room for 20

[Amzee]

looking for a small private room in a nice restaurant in the city to celebrate 80th birthday. All adults, no children. Someplace not overly expensive but, my mom is a very hip lady.

[masha]

Trattoria No 10 in the Loop has some small private rooms that may suit your needs.

[Jack B]

One of the Mia Francesca's should be able accomodating. Good food, family style well portioned. and affordable