Not sure where you’re from, but in the US, a dive bar is a bar, usually located below street level, that you can dive into for a quick drink on your way home. They were given a bad name in the press (surprise!) as low-class places with a reputation for debauchery. They’re also places where people can take a break from their daily grind, and enjoy a laid-back conversation with like-minded individuals. 

Bars and taverns have a storied history of being the places where revolutions start, both culturally and politically. Think about the American Revolution, the revolt against Prohibition (what’s a speakeasy other than a secret dive bar?), anti-war protests, civil rights, punk rock, etc.

A dive bar is exactly the kind of place to mingle with people from all social classes to talk freely about bitcoin.