In reply to arose:
If you're planning on travelling, doing the "classic provincial ridges" (not sure if it's actually a thing, but it should be!) would be a good way of getting around the country, and they all have other good crags nearby (bar Carrot Ridge).
Leinster- Great Gully Ridge (HS 4b) (next valley over from Glendalough, much more remote feeling)
Ulster- FM (VD)
Munster- Howling Ridge (Summer) (VD)
Connacht- Carrot Ridge (D)
A few of the more adventurous crags that I'd have in Classic rock would be:
Luggala. Shamefully underappreciated I feel. Halfway between Dalkey and Glendalough yet I reckon it sees about a tenth of the traffic, and I really can't understand why (unless you do Muskrat Ramble, then I understand...). Pine Tree Butress (S 4a) is mega, Clingon / Claidheamh Solais (VS 4c) and All Along The Watchtower (VS 4b) are also great. It's a beautiful spot and feels more remote than it should. Great two storey bivvy cave near the lough as well...if you can find it
Sail Rock - slightly pushing it out of Classic Rock territory as Roaring Forties (VS 4c) is VS, but it's one of the most atmospheric and amazing venues I've been too, would highly recommend (Main Mast (E2 5b) is the showpiece, but a bit outside of Classic Rock remit...).
Gola Island - a great mix of adventurous and relaxed. Can do a day trip, but worth camping near the loch overnight (ferry is about 20 minutes). Mostly single pitch, Buzz Light Year (HS 4b) and Pride of Gola (S 4a) are class.
Ailladie (Burren, Co. Clare), albeit there's not a huge amount at Classic Rock level- Jug city (VS 4c) is the standout if we're counting VS as Classic Rock, not much below that.
Coumshingaun is an amazing bit of architecture- walking in in the dark and first views of the area being from a sunrise bivvy is something special! Downside is it's a bit of a way from any other climbing, and it only starts at about HVS- Dark Angel (HVS 5a) is wonderful though, just ignore how green it looks from below, it's actually clean.
Something from Muckross Head would surely get thrown in as well, although I'm not sure whether it would be for the ridiculousness of the climbing or the ridiculousness of the route name. Probably both.
A few other routes that are on the more adventurous end would include:
The Razor's Edge (VS 4c) - although you do need to do an E1 to get back out (although soft and safe. And fun...).
Pillar Variant (S 4a), Agag's Wall (VS 4b) and Brewer's Gloom (S 4a) are all great, and can be done on the way down from FM. Also a really fun little cav scramble/squeeze that should definitely be done if you're there, it's up the side wall of 3rd corner buttress if I remember right. Bring a headtorch, not a bag!
Class Distinction (S 4a) (not necessarily adventurous, just class. As the name suggests!)
I'd also throw everything at Fairhead into it, although that might not quite fit the remit of classic rock...
Post edited at 22:19