If anyone's interested in reading more about the bizarre Allied/German PoW arrangements at The Curragh, I can recommend the book Guests of the State by T. Ryle Dwyer. I bought a copy in Ireland many years ago, but as far as I know it's available online via the usual sources.
IIRC, by 1945 PoWs of all persuasions would regularly leave the camp for nights out drinking and carousing in Dublin, which is quite some distance from The Curragh.
By all accounts, USAAF aircrew interned in Sweden also had a high old time.