Roadhouse is a little bit country, a little bit rock ‘n’ roll. It’s what you might’ve expected to hear on the jukebox or up on a stage wrapped in chicken wire if you were to pull into a dusty Texas highway bar in the ‘60s. It’s a sound that provided a workingman’s alternative to clean-cut radio polish, a genre that combines the good-time spirit of outlaw country (think Willie and Waylon) with greasy classic-rock power riffs and the timeless grit and easy gait of the blues. Lyrics often focus on hard drinking, hard living, hard loving, and, well, the roadhouses themselves, where the music provided a respite from a lot of that other stuff. Unsurprisingly, all of these qualities make Houston guitar-slingers ZZ Top a high watermark of the sound, and the genre has influenced the vibe of modern artists like Sturgill Simpson and The White Stripes.