At the Mitsubishi Electric-sponsored DCROSS cafe, near Maru Biru. I was going to go to the Dragonfly Cafe, but it didn’t look too inviting — very sparse, almost clinical, interior.
Update: I was really disappointed by that Dragonfly Cafe. I quite like the one in Aoyama, and often go there (and bring people along), and find it hard to believe that they would/could create a space that felt so uninspiring. More than anything, it just looks boring, and the layout gives it a cafeteria-like feel. Not to say that DCROSS is a great spot — it’s a bit too commercial for my liking with all the product ads everywhere — but I had a comfortable couch to sit on and relax after my long day of walking.