Some relatively more affordable dinner options, chains etc. and some Michelin guide ones
Luxury dining in Mayfair is typically ££££
I personally am a little over this dining scene in London, but it might worth trying if you haven't before!
These are some nice streets to wander around in Mayfair: Piccadilly Street, White Horse Street - Shepherd Market, Hertford Street, Curzon Street, Mount Street Gardens (Connaught Hotel), Grosvenor Square, Duke Street, Weighhouse Street, Davies Street, South Molton Street, Brook Street, New Bond Street, Brut...