I'm planning a banquet in Chicago in June to celebrate my two children's graduation from high school and college. We would have no more than 30 guests, perhaps closer to 20. I would like to hold it in a restaurant, preferably Chinese but perhaps Italian. The guests include several vegetarians plus a few older, conservative eaters (hence, the possibility of Italian instead of Chinese). Don't want to break the bank, but want something good. All suggestions welcome.