Hi,
this is a pretty old thread, but I guess I could put my contribution here. I personnally like very much the view from the new Otani new Tower, where there is a very nice "all you can eat" buffet (a good and reasonnably expensive date spot), and a fantastic view of Tokyo, especially of the gardens around Akakasa.

I posted a few picture, and a suggested walk of Akasaka and Hanzomon neighbourhood there: http://uchimizu-en.blogspot.com/2008...-akasaka.html/