Cockles and Mussels, Dear Molly Malone The Dublin Castle doesn’t pretend to be trendy, it doesn’t pretend to be cool, in fact it doesn’t even pretend to be clean. It’s grubby, it’s dingy, and it’s great for a night out to watch a band and not have to battle your way past girls teetering on their stilletoes, poking you in the eye with their hairsprayed locks.