Post colleague Dan Zak has a weekend piece discussing the “dueling happy hours” between a long-standing conservative monthly get-together and a newly formed progressive one. And it all started with a think tank.

First Friday formed in 2006 when a posse of Heritage Foundation co-workers ambled across Massachusetts Avenue NE to Union Pub. They desired a social setting with no strings attached (no guest speaker, no book reading, no dress code or registration or cover charge), so they formed their own.