Few bands have been through the good, the bad and the ugly of life in the music business more than Gwar. It’s endured the deaths of members, crushing poverty, epic internal and external struggles and the smug indifference of music elitists. Despite it all, Gwar stubbornly and defiantly continues to infect mankind with its pestilent seed. The group will spew in the new year on Thursday, Dec. 31, at the National. Featuring original, Beefcake bassist Michael Bishop in his new role as Gwar’s master of ceremonies, Blöthar, the Hopewell native with a doctorate in music from University of Virginia also will perform with his criminally underappreciated ’90s group, Kepone. Richmond metal group Occultist and Guns N Roses tribute act Rocket Queen round out the bill. Doors open for this orgy of wrongness at 6:30 p.m. $30-$35. thenationalva.com.