Many art deals were struck at London’s Groucho Club, the favorite hangout for artists and creative types as soon as the private members’ club opened its doors.

The art director of the international bestseller The Joy of Sex was an early member. Anthony Cobb found the Groucho "very useful" for recruiting models for later editions of the 1972 manual-turned–coffee-table book, his son Ben recalls.

Ben Cobb revealed that his father once took fellow member David Hockney to lunch in an attempt to persuade the artist to contribute drawings for a special edition.

"It wasn't to be," Cobb told the Times of London.

He was speaking ahead of the release of a film starring Colin Firth as Dr. Alex Comfort, the book's author. The movie about the doctor's own complicated sex life, which is directed by Sharon Maguire, the filmmaker behind the Bridget Jones films, has yet to secure a release date.

New York's total auction sales last week, driven by the $50.1m sale of Gus, a T. rex skeleton at Sotheby’s, which accounted for nearly 67% of the total.

To avoid a clash with Frieze Seoul in the fall, the fair's owner has pushed back The Armory Show by a fortnight.

Both part of Ari Emanuel’s MARI events company (formerly under Endeavor), The Armory Show returns to the Javits Center on the later dates of September 24–27, while the company’s Asian fair opens to VIP collectors in the South Korean capital on September 2.

Kiaf Seoul also opens to VIPs on the same date in the same COEX complex. This year, the Korean fair celebrates its 25th anniversary, while Frieze Seoul marks its fifth edition.

There was plenty of fraternal feeling on show when Neue Galerie founder Ronald Lauder welcomed a gift of more than 1,000 Viennese postcards from the collection of his late brother Leonard.

Some of the postcards, including examples from the Wiener Werkstatte of Josef Hoffmann and Koloman Moser, featured in a 2010 exhibition at the New York museum and will now become part of its permanent collection.

Ronald Lauder said he was "so proud" to accept the gift, which he said reflected the "generosity and foresight" of his older brother, who died last June at the age of 92.

The bulk of Leonard Lauder's postcard collection, which he began building at age six with his weekly allowance and by picking up free postcards from hotels in Miami Beach, is bequethed to the Museum of Fine Arts, Boston.

1 - David Zwirner is closing its Upper East Side townhouse and focusing on its recently expanded Chelsea and Tribeca spaces.

2 - The British artist and academic Christine Borland has died aged 60. Her research-intensive work translated forensic science and medical histories into thought-provoking installations.

3- Lisa Nandy remains the UK culture secretary, keeping her ministerial post in the new prime minister’s Cabinet. But museum directors hoping to charge overseas visitors at England's national museums will be disappointed. Prime minister Andy Burnham is scrapping plans for digital ID cards, which British visitors would have needed to avoid entrance fees.

4 - A new Straits Chinese Museum is due to open in Kuala Lumpur in the fall. It will be housed in a 1911 building that dates from the era of British colonial rule in Malaysia.