barmaid (n.)

"woman who tends a bar," 1650s, from bar (n.2) + maid.

The one employment from which Americans turn their faces in righteous horror is that of the barmaid. They consider it a degrading position, and can not understand how English people reconcile with their professions of Christianity the barbarous practice of exposing women to the atmosphere of a liquor bar at a railway station, where they must often run the gauntlet of the insolent attentions of the "half-intoxicated masher," endure vulgar familiarity, and overhear low conversation. [Emily Faithfull, "Three Visits to America," 1884]