Dublin, the capital of Ireland, is a lovely city, and there's much more to do than drink beer, whiskey, and Irish Coffee. "Craic" (pronounced crack) is a Gaelic word that roughly means fun in a social context, e.g. a lively bar conversation. The Dubliner is not remotely as old as the city, as the late cocktailian and author Gary "Gaz" Regan created it in 1999.

2 ounces Irish whiskey
.5 ounces Grand Marnier
.5 ounces sweet vermouth
2-3 dashes orange bitters

Combine in a mixing glace with ice, stir as if you're walking across the Ha'penny Bridge or the grounds of Trinity College, and strain into a chilled glass, preferable a coupe. Luxardo or amarena cherry garnish optional.

I see the Dubliner as an orange enhanced Manhattan, or a variation on the Tipperary or the Luck of the Irish.  There are a lot of fine Irish whiskies you can use as the base of the Dubliner. I'm not going to recommend a particular one. Regan specifically called for Grand Marnier, used in drinks such as the Burnt Fuselage, as the triple sec (orange liqueur). Using a different triple sec is fine, but of course the result will be different. Amusingly, even though Ms. Cocktail Den and I had some serious craic when we were in Dublin in 2017, we didn't have a Dubliner until later.

Have a Dubliner or two, and your odds of good craic improve immensely. Sláinte!