Originally launched in the ‘roaring twenties’, this magnet for party girls and boys is back on form after its noughties nadir. Put the new lease of life down to a £3m refit that saw the iconic brasserie's mezzanine bar rebooted as a snappy jazz-era late lounge. Sips such as Corpse Reviver and Mayfair Lady are affordable flapper-girl fancies, but flash types will fancy seriously steep 'vintage' stirs such as the 1920s Vowel Cocktail (£80) – a blend of 1990s Ardbeg whisky, 1950s Kümmel, vermouth, orange juice and bitters. Order Champagne and oysters, blinis and posh buffet-style snacks priced individually or as part of a bar package from £85. Tap you toes to live swing bands, swoon over Brylcreemed crooners, smooch to sultry chanteuses or shake your rump to the funk when the venue morphs into a nightclub until indecent o'clock at weekends.