In reply to sebbi:
There's lots of sport in the slate quarries, and some Trad routes that can be top roped at VS but little below this. Start by looking at Bus Stop Quarry.
There's also easy sport at Penmaenbach Quarry and at Castle Inn Quarry. Penmaenhead only has a couple of 5a's, most is 6's and above so less useful. Meliden Quarry also has some easy sport and single pitch.
For easy single pitch and top ropable Trad think about Craig Y tonnau, Barmouth slabs, Conwy mountain slab, Lion rock and Clogwyn cyrau.