SPARTA SLUDGEWORTH / THE BOLLWEEVILS

Hard‑rock outfit Sparta Sludgeworth teams up with the garage‑rock band The Bollweevils for an early‑evening show. Doors open at 6 p.m., offering a family‑friendly (all‑ages) atmosphere where fans can enjoy gritty riffs and high‑energy choruses in the intimate setting of Concord Music Hall.