Probably doesn't happen now, but one of the most unexpected and enjoyable singing evenings we spent was in Peader Kearney's bar in Dame Street, Dublin (interesting bar anyway).
We were staying not far away and nipped in to have a quiet pint, to find a group of mainly local local people sitting around a table and singing a mixture of political, humourous and sentimental songs - nothing mind-boggling, just an enjoyable, unselfconcious singing session by an extremely friendly group of local people.
We were told that it happened weekly, but the nest time we looked in, it was a rather loud, amplified session of young, booked performers, obviously aimed at catching the overflow from Temple Bar (which, for the uninitiated, is an urban version of Doolin, where tourists go to listen to 'Oirish' songs, largely sung by visitors singing to each other)
Jim Carroll