2nd floor lobby area of the Chicago Athletic Association Hotel. It's a large, beautiful space. Food and drink are available but not required. Power is available, but wifi is sub par.
The decor, ambience, seating variety, food, and drink are great. But: the WiFi is atrociously slow, especially for the food prices they charge, and the main table chairs are hard and uncomfortable.
I love this place, and left a few tips about why. But the WiFi is *awful.* It's 2019, and the login screen says "up to 1Mbps," but we never even get that. I hope they improve it soon.