Nice location - with a view of the rooftops - though that is bound to change soon, as Lemonade will move to a new location within the same building. Great food - which is all vegan - falafel was just right, and my companion greatly approved of her vegan mushroom pasta and her banana lemonade - albeit the citrus lemonade did not make as much of an impression on me. The choice of alcoholic beverages is somewhat limited, to mulled wine or punch or grog. Great friendly service.
http://vk.com/lemonaderoof is their website, perhaps that would help follow updates...
Cons: no beer