For what it's worth I think quit if you want. Expecially if you're paying for it. I always sit and think, how many hours I have to sit at crappy work to earn enough money to pay for things, is group worth those hours of hard earned cash?? Group is not for everyone and can even be bad for some people.
I never wanted to go but went to placate some people. I sort of got myself kicked out by telling someone that something was their fault (well, it was) and they should take some responsibility for their own actions for once and to stop complaining and to get of their *** and do something about it instead of coming and *****ing to us. it was true, but I guess I could of put it a bit more delicately. I also thought that it was just full of people who seemed to like an audience and sympathy. Like some support groups where everyone just sits and whinges. Needless to say I didn't divulge any of my stuff and never went back.