Thorleifs are one of the most beloved and longest-running exponents of dansbandmusik, a broadly popular Swedish style inspired by swing, country, schlager, jazz, and 1950s and '60s rock & roll. Though the fundamental and archetypal role of dansbands is to perform live for audiences of dancers rather than mere spectators, many of the groups also released recordings; Thorleifs have upward of 30 albums to their credit. Initially formed in 1962 by singer, saxophonist, and guitarist Thorleif Torstensson, with Hans Magnusson on keyboards as well as sax and guitar, the band hit their...