With a diverse catalog of hundreds of songs, the musical juggernaut Neighbor has become one of the most exciting and unpredictable live bands on the music scene today. The creation of childhood neighbors Richard James (vocals, keys) and Lyle Brewer (guitar), Neighbor combines ambitious composition, soulful balladry, and a fearless approach to their lengthy improvisations. The quartet is rounded out by Dan Kelly (bass) and Dean Johnston (drums). Show at Boarding House Park, 40 French St., Lowell. Tickets start at $39. Fees apply.