Some considerations and factors: In USA, St Paddy's invokes leprechauns, green beer, and corned beef and cabbage. In Ireland, not so much -- locals may say "We don't swallow that shite" and the day matters not, sort of like Cinco de Mayo in USA (vivid) vs Mexico (insignificant).
Besides those signifiers, what else says Ireland, and what can fit into LIT tales? The rainbow's-end pot of gold (cf leprechauns). The IRA, and the diaspora (probably not sexy). Guinness stout and strong whiskey. Irish nuns and priests (woo woo). Certain musical instruments: low flutes, bouzoukis, fiddles, harps, bodhrans. The Pogues
(anglicisation of the Irish póg mo thóin
, meaning "kiss my arse'"). Magic potatoes. The Book of Kells. Shamrocks. Catholic guilt.
Let's mix some of those. Mick O'Cocker is out chatting with the lads, washing down shots of John Jameson whiskey with cheap green beer and munching on deep-fried shamrocks, listening to the Pogues, when a few hot leprechaun babes appear at the end of a rainbow and invite the guys to have magic sex. Did anyone bring a harp? Do the lepre-girls ride My Little Pony unicorns? After some good fucks, are Mick and the lads cooked-up as corned beef? Do magic potatoes save them? Who gets a potato shoved up their arse? Does it sprout?