I hate to tell you, but everyone in this world is somehow involved in a "business". This guy just happens to be involved in with the "let's create fake wealth, enjoy money we don't have or really earned, and make fake personas for ourselves" side of the finance business.
This is prolly the one night when he received his bonus and decided to "splurge" on a Boxster rental, called his sister and some of her friends and got bottle service at Cain. Whatever, been there, done that. Getting bottle service is fun, but just once. The second time you realize that the girls are only after your money, they're no good anyhow. And yeah, paying $400 for a $40 bottle of vodka is just plain dumb. I'm happy for the club owner who's making money off this guy, however.
Having worked in that industry for some time, I met plenty or pr*cks like him. One guy I know even spent his annual bonus on a Patek Philippe Nautilus in one shot, but still lived at home. No lie, true story.
And now that the economy tanked and they're out of their fancy i-banking jobs, they have nothing to show for their efforts, no savings, no brains, just an over-inflated ego.
Oh well.