I'm not good at the intricacies of genre specifications (I tend to like "music"), and these guys make it really difficult. I heard old soul and blues influence, some funk bits...live it felt like some odd psych garage experiment or something. Call it whatever you want, they were sick.
The vid below is the best I could find (from '08), since I can't post mp3s here. It gets real good from ~2:00 through ~3:30. The line up I saw didn't have the tambo/bongo guy, just the 4 others. If anybody wants a track or two, email me: email@example.com