Chicago political party rappers BBU are best known for high-tempo juke-rap cuts like their local club hit from a few years ago, “Chi Don’t Dance,” but on today’s 12 O’Clock Track they go in on a funky slow-burn beat from local producer Tony Baines that will probably make a lot of grown-up backpacker-rap fans real happy. A new BBU album, bell hooks, is out February 21.