Raven. Vicious Rumors. Two respected bands that have influenced many heavy metal acts over the years. Raven, an English band formed by the Gallagher brothers (nope, not those Oasis guys) with singer/bassist John and guitarist Mark in 1974, is celebrating its 50th anniversary on the road playing shows. San Francisco Bay Area metal vets Vicious Rumors have hit a milestone as well, as they’re enjoying 45 years in the heavy music biz. It’s always great when opening acts at The Whisky a Go Go play so well that they win the crowd’s approval just as the evening is getting started. The first band was Wicked, a hard rock band from Rochester, New York, bringing the hard-hitting, guitar-driven rock of the ’70s and ’80s. Lutharo, from Canada, provided a contrast to the glam-ish, “Ain’t looking for not...