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Laurence Harvey in the second photo, Andy Williams in the third, and Telly Savalas in the last one.
And I think the young man with the glasses is Peter Asher.
Wrong date - you're a week early. The party held to mark the end of the Supremes run of shows at London's Talk of The Town nightclub occurred on Sunday, the 28th January at John Bull's restaurant, Chelsea. The Supremes had come from topping the bill on on Sunday Night At the London Palladium.