I have heard the term "club jazz" used by a German DJ that hosts a podcast. He used it to describe a band I started a thread about some time ago, the unfortunately named "Soil and Pimp Sessions" collective from Japan.
Hard driving, swinging minor modal number prevail. No electronics, from what I have heard, and solid solos. Think of a McCoy Tyner BN session from 1968. The funk is there, but not the pop-music kind. I would like to explore more of the scene, but as you have pointed out, the prices are more than prohibitive on my miniscule monthly music budget.