One floor above him, shoppers push trolleys up and down the aisles, picking up their weekly groceries.
But this isn't Chris's full-time job. In fact he's not getting paid a wage at all. Chris actually teaches political science at City University of New York.
He is one of the 16,000 members of the Park Slope Food Co-op, who volunteers at the store.
The co-operative is one of the few in the US that still has a member labour requirement - members have to work there if they want to shop there.
Awaiting comments on the evils of socialism, or how it can only work on such a small scale, etc, etc...