Nickname given to Donald Trump's tweets in resemblance to Roosevelt's fireside chats and how he talks directly to his fellow Americans in times of hardship.
Public conversation between two or more personalities, not at the classic press-conference-table, but "in a cosy corner" in a way to create an atmoshphere/illusion of intimacy, privacy...
During a fireside-chat Harry and Eric asked questions to Simon about the economic situation of their company.