What non-religious groups are surprisingly cult-like?

"Therapy. I was 6,5 months in a mental rehab facility and it was like a cult. We were not allowed to share what happened inside that place, were only allowed to use mobiles for a short amount of time a day. We made our own food and were forced to do activities inside that place. We were near the capital and like 30mins from a mall but were only allowed out of the facility for 2 hours a week. The first 3 weeks we weren't allowed to leave or have visitors. Every day we would have group sessions and one of them was music/dance therapy. I felt so out of place. It was messed up. I remember asking myself "This isn't helping? What am I doing here?". After I finished my therapy I was able to leave. All together it was not that bad, but the feeling that the therapists and nurses were supervisor was horrible. I felt like everything I did was monitored. Atleast it gave me time to think about my life and have a little break from my stressful school and family life. "