For a truly unique Dublin experience, seek out The Hacienda bar, a hidden gem on Little Mary Street near Smithfield. This isn't your average pub; it's a quirky, local institution where you have to ring a doorbell and be vetted by the legendary owner, Shay, who decides who gets in. If you're lucky enough to pass muster, you'll enter a wonderfully eccentric space with red lighting, pool tables, and the famous "wall of fame"—crammed with photos of Shay alongside the countless actors and musicians who've found their way here, from Ed Sheeran to Saoirse Ronan. It's cash-only (although more recently I think he's been taking card), full of character, and the epitome of craic—a must for those seeking something off the tourist trail.