Hi Caren,
I'm sorry to hear about the strict rules. I agree with serafena, that really is rigid and I think she should take yours and others medical conditions in consideration. Does she know about how bipolar affects you? Maybe she might be more understanding if she knew why you were missing the meetings?
I hope things work out for you. I agree with serafena's suggestion for gathering phone #'s so that you can still keep in contact with your friends and plan your own outings if the Red Hat club won't take your issue under consideration.
Good Luck!