Six albums into their career with the release of Lisbon, the Walkmen -- Peter Bauer (bass/organ), Hamilton Leithauser (vocals, guitar), Paul Maroon (guitar, piano), Walter Martin (organ/bass) and Matt Barrick (drums) -- continue to experiment with music while retaining the band's core sound. They are broadly classified as American indie rock, but who isn’t these days? More specifically, the group produces a surf rock sound that compliments their retro persona and works metaphorically within the music itself. Guitar riffs shimmer like sunlight on water. Musical surges swell like the ocean, while a barrage of cymbals could easily be the crashing of waves on the shore. The disparity between the rueful vocals and upbeat rhythms bring to mind the moments in life when the build up of optimism and hope collide with frustration.