If you think planning a playlist for your friend's housewarming is stressful, imagine what rocker Luiza Sa of CSS is going through right now. Tonight she DJs a free show at New York's Webster Hall that's headlined by Here We Go Magic (Brooklyn folkster Luke Temple's project), Titus Andronicus (hometown punks), Woods (psychedelic jam-stuff) and Beach Fossils (indie buzz band). So how do you make ...