I don’t think you should worry about what other people are saying about you. It sounds to me like they’re being very rude. As far as those women joking about virginity at your Meetup group, I’m certain they were making jokes about themselves and it had nothing to do with you. I think you should keep joining Meetup groups and form one of your own if you don’t find a good one. People will join your group if you set one up. There are always nice people out there looking for positive and constructive things to do. Don’t give up.