British Folksinger Laura Marling will perform an early show at The Mercury Lounge on Houston Street. You can listen to her on her site as well as hear her debut album. She appears with a British Afro-beat-bluegrass group (is there such a combo?) Mumford & Sons which starts at 6:30. $12 in advance $14 at the door. Beer extra. There are very few seats at the Mercury Lounge. If not standing is urgent, get there early early. New Yorker snippet review is here.