Community Space Availability

does anyone know if there are spaces, rooms or areas that are available for support group meetings. i am looking for a space that is either free or very low sliding scale free. i am not preferential to the politics of the space (church, or affiliation etc.) i am just looking to start up a small group with weekly meetings etc. any information would be helpful. i am looking in and around the park slope area. thanks.

check with the prospect park y
and the old stone house