Amazingly enough, I spent a very nice St. Pat's at the same place that hosts our Fri night session. The band was the Great Bay Company, composed of musicians that are regulars at that session. They play every St Pat's. People were boldly singing along to songs like Wild Mountain Thyme, Black Velvet Band, and the multiply-requested Wild Rover. I guess if you sing the songs often enough, folks can learn them. They sure seemed to know the choruses pretty well. Persistence pays off.