It seems to me that this club violated the law since it was offering it's premises to the public for rent. Once you cross that line and become a business open to the public for the rental of the premises your claim to privacy is gone.
The restricted membership policy may pass the test but once the premises are offered for rental to non-members, the restrictions smack of illegal discrimination.

__________________
“ The subjects of every state ought to contribute towards the support of the government, as nearly as possible, in proportion to their respective abilities; that is, in proportion to the revenue which they respectively enjoy under the protection of the state.”

Adam Smith , The Wealth of Nations 1776

"We have always known that heedless self-interest was bad morals; we know now that it is bad economics"
FDR's second Inaugural Address