Its not central but have you tried a place called Wallslough cottages. Ive been bridesmaid twice in the past year and we used their cottages for the 2 hens parties. Ive stayed in Wallslough for 3 hens !Great location and for �52 per head for the whole weekend its an excellent deal.
Its a 5min drive into Kilkenny city and each bedroom has its own bathroom. Can be a bit cold this time of year but if you ask them to put the heat on the day before to warm the place up it works a treat.
We organised surprise parties for both hens in one of the cottages and they went really well.
Booked dinner for 22 people in langtons on the Saturday night - very reasonable and food was fab. We then went straight into the nightclub afterwards so it cut out the worry of wondering whether we would all get in.
If you need anymore info pm me.