My husband is turning 40 this October. We live in San Francisco and are coming to Chicago for the weekend with ~25 of his closest friends. We're planning to go to the Notre Dame/USC football game on Saturday. On Friday night I'd love to host a birthday party at a really fun restaurant who has a private room. Does anyone have any recommendations? I was thinking aigredoux would be a great place? We're looking for great food and good ambience. Thanks!