Volunteer work. Church. Adult education classes. Art classes. Rec sports leagues. Writer's groups. Pick something you like to do and do it in public with others. Check your library for activities and participate.

Equally important, ask yourself why you don't already have friends. You may need to be more outgoing, more interested in others, more willing to try new things, more willing to talk and listen. These things may feel unnatural at first, but you *can* do them and they are what will establish bonds beyond just being in the same pottery class. This will take some real effort, but it will be very worth it.