A  version of this article originally appeared in  The Back Room ,  our lively recap funneling only the week’s must-know art industry intel into a nimble read you’ll actually enjoy. Artnet News Pro members get exclusive access— subscribe now  to receive the newsletter in your inbox every Friday. There are half a dozen fairs running next week in the Big Apple. Chief among them is Frieze New York , which opens to VIPs at the Shed on Wednesday, May 13, with 68 galleries, around half of which are New York-based. Meanwhile, more than $1.8 billion worth of art is set to go under the hammer across the major auction houses, starting at Sotheby’s on May 14, where Robert Mnuchin ’s monumental Rothko is poised to bring in $70 million to $100 million. The house’s total low estimate of $690.4 million for the week is roughly 70 percent higher than the total hammer price achieved in the same auctions last year.…