Today we visited a place I discovered by chance on my last trip: Marunouchi Cafe Seek. It's situated right above the JNTO Tourist Information Center in Marunouchi and it's awesome. The staff is very, very friendly, they all speak very good English (and I mean English, not Engrish :P), you get free internet access, free green tea, you can test your skills at calligraphy, origami or simply Japanese writing. We had the most fun trying on Kimono's and posing with umbrellas for photographs.
Trying Origami & chopsticks Posing in Kimono If you are in Tokyo, please stop by to make an origami crane. They are collecting 1000 cranes with good wishes from around the world for the Memorial Peace Ceremony in Hiroshima on August 6.
Cranes collection Cafe Seek website