How do you follow up one of the most groundbreaking albums ever made? For Van Halen, the answer was obvious. Treading the same path the band took to stardom on its debut, and upping the fun factor and musicianship, Van Halen II extinguished any possibilities of a sophomore slump. Leveraging years of experience as a tight-knit live group, drawing on material initially recorded for its professional demos with Kiss leader Gene Simmons, and hitting the studio just days after completing a 10-month tour, the quartet completed the 1979 LP in under a month while inviting fans to “dance the night away.” Boy, did they ever.