Let me tell ya, if church was like this all the time, I would go every Sunday. The Violinaires are not necessarily a Blues band, they're really a gospel group. But that's OK, they get a pass because this song is from the famous blues label Chess Records.
I discovered this song surfing YouTube for Humble Pie songs. I stumbled upon the Humble Pie version which is rather awesome too! I just love the low-down groove that both groups lay down in this song. I am also impressed by the vocal stylings of both Steve Marriott of Humble Pie and the singer for The Violinaires. They lay down a cool 60's soul style rap.
Take a listen to both versions below. Unfortunately for all you eager buyers, I could not find a site that sold either song. I suppose an obscure cover by an even more obscure band don't add up to a high demand for product.
However, that's usually the sign that it's a hidden gem. Enjoy.