In reply to s.thursz:
Pant Ifan Upper tier at Tremadog would be a good bet, plenty of pleasant easy routes, decently quick drying and a bit of a sun trap. The walk in is about 15 minutes uphill slog though.
The Ricks and Racks behind the RAC boulders have some OK routes too but are mega boggy.
There's a crag the opposite side of the road to the Cromlech boulders which would be suitable, it's a 1 minute walk in, some easy climbing and anyone likely to whinge about people top roping on it will be on the "real" crags anyway.
The selective guides don't seem to cover this kind of stuff too well, however the CC definitives do have quite a few of these crags dotted about so it may be worth taking a look in them.