It is a lot easier than you may realize. In person groups are all around you. It's just a matter of knowing where to look. You can start by going to your local library. The resource librarian will know how to help you begin looking if she or he doesn't know of a group personally already.
Newspapers are a good place to check, also.
Look in the want ads to see if there are any groups advertising for new members. If you still can't find a group, check with your community center or the city hall to see if there are any groups registered using city buildings for their meetings. One other place you can check is with any local colleges or adult education classes. And, finally, if you have found no luck with any of these, start your own group. Advertise on community bulletin boards and grocery store bulletin boards.