At The Cage, 97 Ash St., this weekend: Friday, April 6, Thunder Road, above, 8 p.m. to midnight. Band members, from left, Pete Simon, guitar and vocals; Steve Smith, lead guitar; Randy Shaw, guitar and vocals; Gene Rich, bass and vocals; Dave Hanlon, drums. FMI: call 207-783-0668. No cover charge. Saturday, April 7, there is a metal show from 8 p.m. to midnight, with cover charge.