Last call in Chicago?

Factual Questions
1

What are the legal trading hours for the sale of alcohol (both on/off premises) in Chicago?

2

Generally 2am, though 4am places do exist.

3

Essentially accurate, except it’s an hour later on Saturday night (Sunday morning).

http://egov.cityofchicago.org/city/csbac/additionalInfo.do?pageName=start&current=FAQs#Licenses%20and%20Taxes_14