https://www.chamberofcommerce.com/united-states/rhode-island/east-providence/church/37491836-first-spiritualist-church-of-rhode-island

First Spiritualist Church, East Providence

Attended a friend's event there one evening 10 years ago. No idea if it's still got weekly services but it would be a place to start to ask around?

If not, maybe try metaphysical shops and again just ask the owner (preferably) how you might go about joining a circle.