The Wellington is right in the heart of Dublin's vibrant Temple Bar neighborhood. The hotel tells you there WILL be live music; they are not joking, and it WILL go on till 3 am. Ask for upper floors if that's a concern. (I note in passing that O'Riordan's, the hotel's pub, was quite good.)
The rooms are small, as might be expected for a hotel in a historic district. Our King bed felt slightly shoehorned into the room we had -- no blame to the management, but it might make more sense to opt for two doubles so there's room to get in and out of bed for everyone.
We had a lovely time there, and would not hesitate to return to the Wellington.