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50 St James's Street is a Grade II listed house in St James's Street, St James's, London SW1, opposite White's Club. It was built in 1827, and designed by the architects Benjamin Wyatt and Philip Wyatt, as Crockford's, a gentleman's club. It was altered from 1870–75 by C. J. Phipps. From 1999 to 2009, a luxury casino named Fifty, owned by Robert Earl, operated on the premises.