The Pub is a longtime hangout at the University of Chicago with bar games, pub grub, cocktails and a rotating beer list. Unless you're a student or affiliated with the university, you'll have to tag along with a member to get access.
The Pub is a slightly hidden bar with pool tables, a famously difficult trivia night, and an excellently curated craft beer list. It has a membership fee, but it's cheap and it's worth it.