The term 'barmaid' specifies that the person serving is a woman; for men, 'barman' is used. The barmaid remembered all the regulars' favorite drinks.
Pro Tip 2/3
Workplace Setting
A barmaid typically works in an establishment serving alcohol: bars, pubs, or taverns. Friday nights are busiest for the barmaid at the pub.
Pro Tip 3/3
Cultural Stereotype
Historically, barmaids have been romanticized or judged in culture, but today they are seen like any other worker. The barmaid in the story was a symbol of rebellion against social norms.