Just people I know; extended family and neighbours. I will usually get excited about finding a free/cheap bike online, then repairing it, then asking around to find out who needs one. That’s not my main purpose, however. I usually keep the best bikes because I become attached to them. It’s just great to spend time bringing the bikes back to life.
if there was a local co-op, I would be totally up for volunteer work. I may look in to it!