Lots of good advice here. If you’re staying downtown, the West Loop (the Randolph and Fulton area) is very close.joelb wrote: Thu Sep 30, 2021 12:53 pm If you want to walk to food/bar entertainment from where you are, find Randolph and Fulton streets, both of which run west from downtown. Just walk them a mile and you'll pass dozens of restaurants, bars, breweries etc. Take your pick. The Loop and River North, on the other hand, is largely filled with restaurants that cater to tourists, conference attendees, partiers, etc. There are gems here and there but it's not where I'd wander.
Millennium Park/Maggie Daley Park/Buckingham Fountain/Grant Park/the Lake. Yes touristy, yes very much worth spending as much time as you want walking/biking around. The skylines around the park are breathtaking, take a moment. And speaking of tours, the Chicago Architecture Foundation river tour is completely 100% worth it.
Enjoy being outside in the city while you can, cause winter will be here soon enough.
As far as museums go, if you only have the time or inclination to visit one, make it the Art Institute. The aquarium is fun, but a lot of cities have them. The AI is just really special.