Today, door staff in biscuit-coloured suits greet intrigued passersby and diners sip wine on the umbrella-strewn terrace at street level. Above this merry tableau, Theodore Roszak's 35-foot gilded eagle – an original feature from the building's Embassy era – watches over the square from the newly added seventh floor. Mine is on the sixth floor and has views of Grosvenor Square from floor-to-ceiling windows on three sides. Similarly, the Asaya Spa, on one of the basement levels, has – I'm told – the only full-length (25-metre) swimming pool in a Mayfair hotel. And then there's the Eagle Bar, a late-night terrace atop the building, dominated by that 35-foot gilded eagle, which is quickly becoming Mayfair's hottest table to book.