Working with groups is really an adventure in itself. Since we have our own business and homeschooled, our groups have pretty much been hand-picked and really enjoyable.
I've been volunteering with new groups this year and have found lots of variation.
One pretty much conveyed that my help wasn't worth keeping after I offended one member while following one of the group rules.
Another group ran its course when the people we were supposed to help conveyed that they didn't want the help because of liability issues.
Another group has some funky communication established with a whole political hierarchy even among the volunteers. My mentor went so far as to tell me not to speak to others when I had questions.
Help is a funny thing.