How late are most restaurants in Chicago open?

I'm going to Chicago for vacation in August and I was wondering how late most restaurants stay open. Will there be a good amount still open after 10, especially near Grant Park or about a mile north of that?How late are most restaurants in Chicago open?
I know there is a restaurant named Aria. It is located at 200 North Columbus Drive, Chicago, very close to the Grand Park. It opens until 10 pm. but on Friday or Saturday, the restaurant would be available until 10:30 pm.

Hours of Aria restaurant:
breakfast sunday to Saturday -- 6:00 a.m. to 11:30 a.m.
lunch sunday to saturday -- 11:30 a.m. to 2:30 p.m.
dinner sunday to thursday -- 5:00 p.m. to 10:00 p.m.
friday to saturday -- 5:00 p.m. to 10:30 p.m.

2) You can also come to Tavern at the Park. Normally, this restaurant operates to 10 pm. on Friday %26amp; Saturday, it would provide dinner until 10:30 pm.

Tavern at the Park hours:
Monday through Thursday 11 a.m. to 10 p.m.
Friday 11 a.m. to 10:30 p.m.
Saturday from 12 p.m. to 10:30 p.m.
Sundays Closed
Website: http://www.tavernatthepark.com/ phone:312-552-0070
Address: 130 East Randolph Street Chicago, IL 60601

It seems lots of restaurants are concentrated on North Michigan Avenue, maybe some of them would open until midnight.
Not the non-chain ones usually, no. Certainly not after midnight either. I know in my neighborhood there are only a handful of non-chain restaurants open after 10pm.How late are most restaurants in Chicago open?
If you're talking about McD's - they're open 24 hours.
your best bet is to do it before 7