Genie,All my pals know I'm Scots/Irish (and proud of it!), so I'm the guy that gets called up to sing the good old cheery "Irish" stuff at my local Friday night open mic hangout (not an Irish bar). Aye, "Grace" is a bit melancholy for a typical Irish theme bar, especially here in the States. Actually, I sing it by request along with "Fields of Athenrye", "Rose of Tralee", "Red is the Rose" and others. Last year was the first time anyone asked me to sing "Grace" at a St. Patrick's Day do.
I'm not so much against "Unicorn" really. I just get a bit sick of it, and it irritates me a little that people associate it with Ireland. I suppose you can't blame them, considering the fellas that made it famous. You're absolutely right, though. People like to join in and do the actions.
"Slauncha"HS