At the Authentic Coffee Co it's not just the beans that are the real thing. There's a jam every week (Friday, last I heard) where some of the best bluegrassers in the wider Tennessee area gather. But the most authentic thing here is the folk. Jeff, his barista-daughter Sierra and his banjo-prodigy son Luke are generous hosts - so generous they opened late one night so we could carry on jamming. And the hazelnut soy latte Jeff knocked up for me? Delicious.