It's very common to plan a night or a weekend up to Dublin.
(as your cahir, I'd say Cork. I dont actually know anything about gay places in cork, but I do know cork is a lovely city., I'd be shocked if they didn't have an open welcoming scene)
I try to get up dublin whenever I can, and I've met some good people.
If you're ever stuck for a wing man or just someone to chat with (if you don't fancy going alone). You'll find people in communities like that meet up and organize nights.
I'd even say Gaire here is probably due a meet up soon, so keep your ear to the ground.
Some folk are quick to dismiss the scene "I don't bother with the scene", "I'm non scene" like it's some usless, vapid community of pricks, but my experience is, you dont know the full story unless you give it a go.
My first few weeks going out alone, shy, nervous, I went to Nealons, PantiBar, The frount lounge, The George.
I had overwhelmingly positive experiences with people I met, and you just put the bad ones behind you.