I used to go to an embroidery group the first Tuesday of every month. I loved it!
I work full time and the local quilt guild meets during the day, so I cannot go.
I think home situations contribute to whether a group is wanted or needed. I have 4 pets, 2 teens and dh at home. Even if I leave the housework and cooking, someone wants something from me. My 'Me time' is constantly interrupted. If I sew away from home I do not have those distractions.
I have not been to a quilt group, but have done a few weekends with Ron Collins an incredible sewing instructor. You work on your own project, but have Ron available to help as needed. At one retreat, I had one plan and after finding some cotton shirting printed with Hawaiian shirts, wound up making my DH a shirt, Ron was there every step of the way helping me to match the pattern across the front perfectly and perfecting the fit. Without that help, I would never have managed to make such a great fitting shirt.