Cahoots
The 1940s styled underground bar that is conveniently hidden amount the hustle and bussle of Carnaby Street (via Kingly Court) in London. I went here for a reunion with a few friends from uni. Despite the crowd and clearly very popular with every seating and table reserved, we still managed to find space at the bar area and try their grand selection of cocktails.
Definitely somewhere worth trying out, especially for intimate/small parties although I would suggest to make a reservation in advance.