'the palladium of the club'

Bill, I'd been aware that there was a theatre in London called the Palladium
http://www.britannia.com/travel/top/palladium.html
but was unaware it was also the name of an element!

However, it turns out (M-W again) that a Palladium is "a statue of Pallas whose preservation was believed to ensure the safety of Troy" (one for a certain Board member, perhaps )
And in the plural it means safeguard.

This would suggest that either the Palladium theatre has a statue of Pallas (or a Palladium) in it, or it is considered a safe haven in some way. Though I suppose it may just be a pretentious way of specifying itself as the heart of London.