the barbiturates are an irish rock band. 'famous blue raincoat [reply] a letter to leonard cohen' is wry rock/blues tune inspired leonard cohen's classic bitter break-up letter song, 'famous blue raincoat'. the barbiturates don't lean too heavily on their mighty source material though, this song is a rocker in it's own right, with a performance style video to accompany it.
seems to be written from the perspective of the guy who stole leonard's girlfriend away from him, if you know the plot of the original song.
listen to more of the barbiturates here.