There was a Dennie Mancini who was a respected corner man working with a lot of top British boxers who was part of a large boxing family. His day job was as landlord of the Lord Palmerston pub in the King's Road. Could that have been the pub?
Cheers, Frenchie...that sounds quite possible. Didn't think I was making it up!

I love those... And as for that naughty minx, Samantha...