Cammie has a Hermés Birkin pulled up on a resale website. She pushes the blinding screen towards my face across the white tablecloth between us. She’s talked about wanting a Birkin before, but I didn’t really think about it that much.  “It’s ostrich leather,” Cammie says, and she pouts. Her raspy voice is hushed over the trepid steakhouse pianist on the baby grand. What does it take in life to become a steakhouse pianist? “It’s an investment piece. Ostrich leather is going to have better resale value than cow leather. But it’s much less than crocodile.” The orange pinpricked leather…