I can't remember the name of the street but there's a kind of "Irish Alley" of pubs selling Guinness and /or with some Irish music...best is the "Druids", they have some good bands on...ask about a band called "Na Fianna", main man is Alejandro Sganga, he used to be in a band called "The Shepherds" (!) -now defunct- they played there alot, or visit Na Fianna's website www.nafianna.com.ar, whatever happens, you'll have a great time in 'the city that never sleeps'