Actually, they do! After a reference to high tea, Hannah wondered aloud about the existence of an opposing consumption time. Once the laughter subsided, it was deduced — incorrectly! — that no, there had been no such thing as low tea.
Wikipedia cites Macmillan English Campus for their breakdown on the matter. Originally known as afternoon tea, low tea took place at a low table during the middle of the day. It was generally considered a social occasion. On the other hand, high tea (or meat tea) was intended for the working class. Upon returning home, high tea would be served at the (high) dinner table. In the end, it all boils down to table height. And tea leaves.
