The California label Amiri sat somewhere in the middle. The dominant trouser cut hugged the butt, went straight through the leg and flared at the hem. It was in keeping with Amiri’s now-rote vibe, which is essentially, “If a musician wore it in Rolling Stone 50 years ago, it’s good for us!” It’s also good for celebrities like Jeff Goldblum, who sat smirking in the front row in a patterned dinner jacket suited for Elton John.