What are some places in Chicago that are open 24 hours a day and have free wifi?|116583

I_m looking for a place (preferably on the north side of Chicago or downtown) that has free wifi and is open 24 hours a day. A specific place would be appreciated. Any public place like a coffee shop, a diner, or something of that nature would be perfect.

Thanks.

Dunkin_ Donuts opens really late but i_m not sure how late. They also have free Wi Fi ;)

My friend sits in the library parking lot in her neighborhood at night, and uses their wifi.

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