The song is "Elephant Gun". The band is Beirut and the musical genius is Zach Condon. The first I heard of them was a song called, "Postcards from Italy" off of the album, Gulag Orkestar and then "Mimizan" from the compilation album Dark Was the Night. From there, my Beirut catalog has continued to expand. Other songs you might want to check out are "Goshen" & "Santa Fe" from the album The Rip Tide and "Nantes" from The Flying Club Cup.
Enjoy your Monday and remember to live your soundtrack out loud.