its only on during summer, and they play movies every night, except monday. But its quite expensive for just a movie... But it has a nice atmosphere, could be v. romantic.
Another idea is shakespeare by the sea, down at Balmoral. its lovely, my boy and I went, but didnt stay for the whole performance because it was so windy you couldnt hear what they were saying! at the moment they're playing The taming of the Shrew, a nice romantic comedy. You pay by donation (they recommend $15 per person) and all the money they raise goes to the Tsunami.
http://balmoralbeach.visitnsw.com/V...-sea.com&ServerID=LiveWeb02&MiniSiteCode=TNSW