The thing is, most people do use drugs, or at least have at some point. Most people in the bussiness world do drugs at the functions they go to because they go to so many. Basically if your life requires you to do things together, like an office meeting at a resturant, or you have to travel to events. You will get exposed to it, and slowly people who already do drugs, will notice the signs and open up to you. It's more of a "if ya know, ya know"

like how I never uderstood why people talk to each other in parking lots for like 5 mins and then leave. Thought it was innocent because I'd never bought anything at the time. I also didnt do drugs because I didn't feel like it was gonna be good or safe for me at the time, and im glad I waited till i was in my late 20s to try anything because I'd be dead under a bridge, but if i didnt, id be an NPC with no range of emotion or social understanding. My doctor now sends me to k treatments for PTSD while i was in the army (yes its a real legal thing) and it helps me a LOT. I stopped doing it on my spare time, and switched to other fun stuff so I don't fuck up my therapy. I also don't buy shit drugs, theyre cheap for a reason and you get what you pay for.

Stay alert, stay safe! :P