Cutting out drinking and good food, well that just leaves music and museums. Unfortunatley, music usually involves drinking and good food.
It'a bit too early to make outdoors easy, but Chicago is a beautiful city on a sunny, mild day with a lot of shopping on Michigan and State Streets, you can hit Buddy Guy's Legends Downtown too (come early to get a seat). There are river tours etc. but a bit early for those, same with the open bus tours. Lots of good bar and entertainment strips, but not their thing. As already sid:
Sears Tower or Hancock Bldg for overview of city
Museum of Science and Industry
Field Museum
Shedd Aquarium
Adler Planetarium
There are also a lot of small, universty related museums covering niche areas.
There is the McCormick Mansion of Robert R. McCormick, Tribune founder, and a seperate 1st Div. Museum on the property in honor of his WW1 service as an Arty officer. Nice combo package, with one for the guys and one for the wives (out West in the Naperville/Wheaton suburbs).
Gold Coast for fine but expensive dining
Navy Pier for the tourist thing
Charon