For their latest release, Motion to Rejoin, Alabama earthies Brightblack Morning Light conjured longhair folk spirits at a solar-powered desert studio in New Mexico. Tonight, the band performs other fantastical feats and attempts to sway you in favor of drug legalization, sustainable living and any number of other causes. Sit cross-legged and let Brightblack amp your mellow with their easy grooves and reiterative utterances.