I tell you what - If I was a hobbyist, I would not go to a place where patrons of an illegal industry could knock and feel free to come and go. Surely, that studio has a method of screening their clients. In fact, Your best bet would be to ask them directly.
I've been to Relax, nobody had to vouch for me. Maybe that has changed, but if I were them I wouldn't hold my breath waiting for new clients. Hey, Mike in Finance! Can you give me a referral to that L2 studio you told me about in that meeting? I'm not thinking that's a great plan.