Mad Crush’s theatrical, back-and-forth performances between singing protagonists Joanna Sattin and John Elderkin are complete with humor and hurt, vivid little dramas about making it through the day. The band, based in Chapel Hill, N.C., consists of local veterans Chuck Garrison (Zen Frisbee), Mark Whelan (The Veldt), Laura Thomas (Hindugrass), John Elderkin (The Popes), and newcomer Joanna Sattin on vocals.