Stuff to do around town today that isn't booked out.
CAN'T MOVE FOR ART: Frieze Art Fair, the colossal jamboree of eye-catching stuff in Regent's Park, starts today and runs till 14 October. It's not alone, though. The Sunday Art Fair, Moniker Art Fair and Moving Image Art Fair also launch, joining PAD yesterday and Multiplied tomorrow. The whole lot are summed up here. Entry prices vary and some are free, all day
SIGN A GIANT BOOK: A larger-than-life book will skulk at an unspecified location on the Southbank, encouraging people to share their experiences of education. It's an awareness raiser for charity Plan UK, who promote education around the world. Free, just turn up, 8am-6pm
CHOCOLATES AND COCKTAILS: It's both Chocolate Week and London Cocktail Week, and the tastiest nexus in town pairs the two tonight at 68 Dean Street. Move around the 'period property' (whatever that means) sampling the finest chocks and cocks [not sure about that abbreviation - Ed]. £45, 6.30-8.30pm or 9-11pm
BOOKS AND MAPS: Simon Garfield will be at the London Review of Books in Bloomsbury to talk about his new volume, which looks at the history and variety of maps. £7, 7pm
CELEBRITY FOOTWEAR: Try walking in the shoes of some of the world's most famous people, at the Celebrity Shoe Auction in Jalouse Club (Mayfair). Dozens of celebs, including Ralph Fiennes, Noel Gallagher, Kiera Knightley and...well, just about anyone else you've ever heard of, have donated shoes and all proceeds go to Shoe Aid, a charity bringing footwear to impoverished children overseas. £31.05, 7pm
FREE MUSIC: Hear the first public performance of a work newly attributed to Vivaldi, with strings and chorus, at St James Piccadilly tonight. Free, prebook, 7.30pm
ULTIMATE DECADENCE: Fancy trying the world's most expensive cocktail? Salvatore Calabrese will today create a £5,500 tipple at his self-titled bar within the Playboy Club. Just put it on expenses. £5,500, unspecified time
Random London Fact Of The Day
We're out of time today so...for a change, please tell us your favourite facts in the comments. Lazy? Never.
The heavens will open, unleashing a downpour the likes of which ye have really seen, at least since Monday. Have cheer, though, for the weekend's looking brighter. BBC Weather.
Secretly Hidden Fake Fact Of The Day
Highbury Fields used to be in Woolwich, but was transported north when Arsenal FC moved grounds.