For a drink with a view, try the Madison Bar nr St Paul's. The terrace is on an eyeline with the cathedral dome and there are stunning views out across the skyline to the new Shard and London Eye. If you're looking for a drink after work, arrive before 5.30 as it gets justifiably very busy. Much recommended
Where? The Boundary. East. Just off Liverpool St. Why? Roof terrace that’ll knock your socks off. Exceptionally good food, great drinks, fairy lights, fragrant herb garden. Book dinner in the restaurant and start with drinks and nibbles outside. You’ll love it. Also bookable for private events, which would be rather dreamy. Wear? Smart casual. Website. (Priority is given to hotel guests and dinner bookings, so worth giving them a buzz.)
London´s Old Vic Tunnels Space. The Old Vic Tunnels Space was an underground arts venue and performance space beneath Waterloo train station in London. The space consisted of almost 30,000 square feet of unused railway tunnels.