We recently found ourselves in Dublin's Liberties neighborhood and were thirsty for a pint. We wandered into Baker's Bar.
What made the place truly special though was the gathering of musicians and singers. We'd wandered into an old-fashioned trad session where everyone just shows up and contributes what they can. We sat there for an hour. I was even serenaded by the gentleman in the back corner when he learned that we were most recently living in California before Dublin. He did a good rendition of an Elvis tune for me. Love it!