Seriously, Mike Nichols is about the best to direct this kind of intimate movies about male-female relationships. No cliché, he doesn’t tell the story of a friend who find out about the obvious cheat, but the much more interesting one of two friends realizing that the knowledge wanted is not the same anymore.
By the way, some scenes were imitated by Kubrick on Eyes Wide Shut (this movie and everything by Kubrick after the 70’s, seems less and less interesting after I saw several 70’s classics). And when Nicholson say “Here’s…Bobby !”, it’s almost “Here’s Johnny !” already.