A Laughter? A Lullaby? A Lurk?

What's the collective noun for luvvies? Maybe I'll find out tonight when two of us hold a joint birthday party in a bar near King's Cross. I have other questions that I need answered. What is the maximum number of Darling!s allowed before one is officially drunk? What is the exchange rate between Denches and Redgraves? How do I work out which of my fellow thespians has coat-tails I should cling on to before they rise into super-stardom? As a budding player, I have so much to learn!