I personally would check out the other group first.
If it is important for you to try the first group again, I would only go one more time. In my opinion, these people may be displaying poor manners and I would not be that concerned about fitting into their clique. In a group setting that you have to pay dues, no one should be made to feel that way. I am not saying everyone needs to shower you with appreciation for showing up. I am saying a few people and the leaders should have insured that you were brought into the group a bit more.
One more time should let ya know.