In reply to freelunchprovider:
King Wall is an excellent call, I have set up a top-rope or two there before. Also for beginners you can set up top ropes on many of the routes at Three Cliffs fairly easily. While down at Three Cliffs/Great Tor area you have Odin's Wall, Little Star Wall, and Little Tor - all of which have easy scrambling access and a host of great little routes in the lower grades. And you're climbing straight off the sand, which is lovely. Just check the tide times before going - you only get a 5-6 hour window.
https://swcw.org.uk/wiki/Odin%27s_Wall
https://swcw.org.uk/wiki/Little_Tor
Certainly all are easier and safer to setup than scrambling around the loose topouts of the Rhossili crags (which is one of the reasons why the area has been bolted).
PS Like gethin_allen I don't recommend Boiler Slab, for the reasons he mentions, though if the tides aren't convenient then it is an option.