it's a good and simple bar in the rooftop of one of the buildings of downtown. it's totally in the center of the city, so you can enjoy the view from up there for the city. also they offer some snack that you can eat while drinking.
it's a good bar in the middle of downtown, and it can be a good chance to know some locals. also you can enjoy a view of the city form the rooftop in the night while enjoying the beer (only Egyptian beer is offered there, stella)
don't go up on the stairs