Once a month the Tokyo vegan meetup do a fully vegan buffet here. The food is amazing and there's really good variety, and it's a good chance to meet others. It gets booked up pretty quickly though!
(You can find information on the meets at http://www.meetup.com/vegan-389/ )
I've been to the buffet twice so far but I haven't been to the Pink Cow on an ordinary day yet so I can't review the menu options but it's great that they do options !
(I'm not sure why my pros and cons are automatically capitalising every word btw ahaha)
Cons: Not Fully Vegan On Other Days of Course ;(