The Struts perform at The Warfield in San Francisco on March 3, 2020. Gary Chancer/STAFF. SAN FRANCISCO —  Somewhere near the end of their wild rock and roll lovefest Tuesday night at the Warfield, The Struts‘ frontman, Luke Spiller, asked his breathless followers, “Are there any Struts virgins in…

Wayne Kramer of MC5 at The Regency Ballroom in San Francisco on Oct. 4, 2018. Photos: Shawn Robbins. SAN FRANCISCO — A half century ago, when MC5 (the Motor City Five) burst onto the scene, America was in crisis. Ideological differences were tearing the nation apart. Racism was everywhere. Cities…