I don’t know. It wasn’t a true collective, but it was shorter to write than: I knew someone with a house and a room to let, and there were three others who also rented a room.

If you’re in the US:

• search for “co-op housing rental”. Sometimes these are suburban, but other times they’re rooms in a building
• if there’s a “food co-op” near you, then check out the bulletin board. also most food co-ops have some way to join, you can ask “by the way, do you know of any housing co-ops around here?” many/most people who work at a food co-op will be happy to point you in the right direction.