Who is taking child to that group- you, mom or both? Technically EI practitioners can attend community events/go on outings with families because it's part of their natural "routine". I have met my families at shows, shopping trips, the zoo, educational events, etc. where are you located? I would read up on rules and regs and copy, highlight and take to meeting. Unfortunately, we get some roadblocks in EI but with legal docs to back you up and a genuine interest in helping the child I think you will make it happen!