SIERRA LEONE'S REFUGEE ALL-STARS
9 p.m., Revolution. $15.
For the unfamiliar, here's a story for the coldest of cockles: A group of musicians fled from Sierra Leone's horrifically violent civil war, found each other in a hovel of a West African refugee camp and, in the face of such abject adversity and loss, started writing and performing some of the happiest, most optimistic music ever made. (No, seriously: ever made.) The band then found a new home in a post-K New Orleans, recording its second album with a local brass band, now playing to packed houses in America and Europe, all the while raising money for the African refugee charities that aided them years ago. It's world beat, it's African roots, it's reggae and it's a testament to resilience, hope and the power of positive thinking that makes it impossible not to be moved by their story or, for that matter, move your feet to the music.