stated that the record "did much to chart the course of bluegrass for the balance of the 1970s and beyond." In addition to new music, Rounder re-released 78 rpm discs from the 1920s and 1930s. In the mid-70s, with a catalog of about 200 LPs by acoustic artists, the label expanded its Bluegrass focus to include folk, blues and other styles of music, notably signing NRBQ, Arlen Roth and George Thorogood and the Destroyers. In May 1977, Rounder released NRBQ's “All Hopped Up.” Later that year, George Thorogood and the Destroyer's eponymous debut was released; although it was rooted in blues, it was more of a rock album than any of the label's previous releases. Within a year, the record sold more than 75,000 copies, a substantial achievement at the time for an independently distributed record. Rounder released the Destroyer's second album, Move it on Over, in 1978. The title track, a Hank Williams cover, was released as a single and received heavy FM airplay. The album entered the American Top 40 and went gold, as did the band's debut. Irwin described Thorogood's success as a "watershed" moment for Rounder, stating that while it did not change the founder's interest or mission, it made clear that the label needed to expand both its staff and its distribution. Rounder recorded Thorogood's fourth record, Bad to the Bone, and released it through a joint venture with EMI. At the close of the decade, Rounder moved from their Somerville office to a larger office in Cambridge. In 1979, Rounder's employees decided to unionize, and Nowlin, Levy, and Irwin were strongly opposed. The workers voted to join Local 925 of the Service Employees Union. As a result of their opposition to the union, relations between the employees and the founders were strained for several years. 1980s: Heartbeat, Philo, Alison Krauss Although they were approached by less traditional roots artists following Thorogood's success, the founders signed artists that reflected the label's original mission. Among others, they signed Johnny Copeland and Clarence "Gatemouth" Brown. Scott Billington, a musician and Rounder staff member, was recruited to produce Brown's debut for Rounder with Jim Bateman, and together they pushed Brown to record classic blues songs. The resulting album, Alright Again!, won the 1982 Grammy Award for Best Traditional Blues Album. It was Rounder's first Grammy. In the early 80s, Rounder once again broadened its focus, establishing a reggae