I've been a member of the Kwan Um School of Zen since '86 or '87.
Most of my short retreats have been at the Cambridge Zen Center,
where I also lived for a short period.
My longer retreats took place at Providence Zen Center.
The Zen center community and teachers were always there for me when times were tough.
These days I co-host a one-evening-per-week practice done held by the Clock Tower Sangha which borrows from multiple traditions, especially Thich Nhat Hanh and Claude Anshin Thomas.
More Zen Links
John Suler's Zen Stories Page