Examine second table.
It's the tea table! It's supposed to be for business discussions with patrons but that's not what it mostly gets used for. Usually during work days someone is hanging out here, the other apprentices or people from the neighborhood who are waiting to use the source interpreter. You don't think your master realized it would make their shop quite this much of a social hub, or they would have found someone else to host it. But it's too late now, and Zevvie gets the source interpreter when nobody else is using it!