The celebrities and wannabe celebrities who usually inhabit LA's Nobu Malibu were swapped out Wednesday night by bankers in sport coats mingling with startup founders, munching on caviar handrolls while sipping lychee martinis and champagne. The good times are back. It was the closing party for the Jefferies Private Growth Conference, where the bank pairs investors with executives from late-stage companies like Ramp and Databricks. Speed dating for startups, with wagyu beef and a prime ocean