O/T Function Room/Dinner and Dance Hire Cardiff

Myself and my uni set are organising a graduation ball (for Sept 2012 I might add haha) and we're looking for ideas of places to have it. There will be only a small amount of us, there are 12 of us in the set and we'll be bringing partners/parents/siblings etc, probably 60ish all together. We're looking for a 3 course sit down meal type thing, with a DJ/band afterwards.
Any recommendations?

You have a pm mate.