In my opinion any type of treatment is not going to work until she wants it too. I went to 30 day inpatient treatment rehabs more than 7 times and the longest I lasted after discharge was 2 weeks. I never went for myself. Also for me going right back to the same people, places, and things didn't help the situation either it just made it that much easier to use again. It wasn't until I decided to go to long term rehab over 800 miles away that it finally worked. In Nov I will have 9 years clean and heroin was my drug of choice. From day one I loved it and would do anything and everything to get it. I was even on probation for 2 years and had to give urine samples every two weeks and still continued to use the entire time. It just grabs a hold of you and is so hard to let go.
I have been to probably thousands of AA/NA and they are what you make of them. You can find the seedy, creepy element anywhere you go. You don't have to interact with anyone you don't want to. I admit I sought out the ones that were like me and court ordered there and we would go get high after the meetings but once I was serious about recovery and wanted it for myself and not doing it for anyone else I steered clear of those that were not serious about their recovery.
I wish you both luck and I sincerely hope she is tired of that way of life and reaches out for help. If you have any questions or want to talk feel free to message me.