Cobra
The owners set up this exceedingly cool bar when bemoaning the fact that Letná used to be entirely dead after midnight. Almost single-handedly, they've changed that, with cool, modern food, a brilliant cocktail list, a disco ball or two, no proper sign (of course: the right people know where to come), industrial-chic decor, and a welcoming attitude at all hours of the day and late into the night. A gem.