Harlem’s world famous Apollo Theater will play host to Metallica for the first time at a special invitation-only concert for SiriusXM subscribers on Sept. 21 at 8:30 p.m. After 32 years in the business and still thriving in the music scene, Metallica are an unmistakably influential band that has prompted so many artists to sprout up in the metal genre. The group will be performing songs from the entire span of their career live on their SiriusXM channel, Mandatory Metallica. The limited-run 24/7 commercial-free music channel will launch Friday, Sept. 13, at 12:00 p.m., and air through Oct. 6, via satellite on channel 40.