<img src="http://media.newtimes.com/4200342.41.jpg" class="alignleft" alt="" /> There’s no getting around the fact that Grace Potter & the Nocturnals remain the guiltiest of pleasures. Despite being lumped in with the jam-band scene, the Vermont group actually have more of a bluesy (albeit stubbornly retro) classic-rock sound. The Nocturnals can easily stretch it out on extended rambles, such as their glowing remake of Neil Young’s “Down by the River,” but their tasteful lead guitarist, Scott Tournet, generally plays with more melodic flair and restrained eloquence than your usual aimlessly soft-plucking jam-band noodler. 