I also knew one person who worked in finance and EVERYONE did coke; he wasn't addicted and stopped using when he switched fields (he hated the 80h weeks).

These anecdotes contrasted heavily with my experience in the Bronx in the 80s, where drug users were overwhelmingly drug abusers and generally awful people. I still won't use recreational drugs (other than caffeine and alcohol) but I don't judge people who do.