I guess it's not exactly the same as group, but I think it still applies...
The first time I went inpatient, the charge nurse used to tell everyone "whatever you get from here, it should NOT be a best-friend or a boyfriend/girlfriend/husband/wife."

My room-mate my last day there told me she met her ex-husband there when they were both in for detox (but it didn't work out for long.) Guess the nurse was right!