Thanks Pickles, that would be wonderful!
A cycle ride along the Tamagawa is actually on the list of choices of things to do as they will lend you a bicycle for free and I'd also heard it was a nice area (I've been meaning to check out Den-en Chofu for ages) so it's great to have an option in this zone. (I can write out the 'hire' details if anybody is actually interested)
One of the reasons I'm so terribly grateful for suggestions is that I only eat vegetables and fish, no other kind of meat, and my parents are very adventurous omnivores. So all recommendations are especially precious.

Shamefaced edit:
Bagged 'em all ... except Toranomon and Taihei and I would love to 'have' a couple of places near Roppongi Hills as this is actually the area I've always had least success finding nice places to eat (sorry jpatokal!)

Oh yes, good memory Pickles! but Zakuro is just on the border, so it is actually Ginza 4 (-6-1). Very close, and everything else is spot on!