In any other location, this hotel's bland boxy bar would be unmemorable, but the 12th-floor lounge's 360-degree panorama of historic London and its modern skyline is a mesmeric sight. Against such a dramatic backdrop, Skylounge's extensive twin decked terraces are a picture-perfect spot to enjoy sun-soaked lunches and seasonal cocktails that twist the classics. Tawny port and a splash of Prosecco inform American Hustle (a Woodford Reserve Manhattan), Sky at Night (a vodka and sloe gin cup) is a fair summer cooler, while Marshmallow Alexander is a wintry sweet treat. Elsewhere, mezcal-based The Last of the Oaxacans is a fine fix for all seasons. Regular pop-up bars and rum shacks add a blast of colour, and DJs play at Ibiza-style chill-out sessions. Blankets and heaters are on hand should Mother Nature try to spoil the party.