Its strains may be haunting, but western swing is alive and on the upswing, enjoying a renaissance among musicians too young to recall or even comprehend its heyday. For them, the term may evoke the nationally known country music of Bob Wills and his Texas Playboys and the Spade Cooley Band. Yet on the local level, western swing bands dominated the airways and dance halls in every town and rural setting throughout the Southwest in the 1930s and by...