Here's what's going on today (Saturday, May 19): Another performance of Rent at Club One (7:30), the Flannery O'Connor double-bill from SCAD theater students (8 p.m., Arnold Hall), and the Savannah Philharmonic's season finale concert at the Lucas Theatre (also at 7:30). Plus Dangermuffin at Live Wire, These United States at the Wormhole, and the Daniel Johnson Band at Desperados.