In reply to dunkymonkey17: When I was there - 95-99, we used to go to the Beacon on posh occasions but could always get on the small wall in the Friddoedd Leisure centre which is where most of the halls are. It had a fairly small (10m wide) bouldering wall and 8m high top roping/leading walls.
Outdoors, there is always the Arches traverse and a buildering wall below them.
It was always ample.
Ben