The heavy metal band playing in the pub are an Icelandic metalcore band called Moldun, who's debut album 'This Time You Dig The Hole' was released in September 2014.
Stanley Tucci's character was originally written as Scottish. Tucci hired a dialect coach and realized after about 20 minutes that he wasn't going to be able to do a credible Scots accent. He spoke with the producers and they agreed to make his character an American.