Simple list of ports and barmaids.
Sailing Era Barmaid Ports
Q: What exactly do they do beside provide some news?
A: Get them to three full hearts and you get an item after the last quest.
Julianne
Lisbon
Sakurako
Nagasaki
Valentina
Havana
Camille
Marseilles
Gu Wan
Zhangzhou
Merriam
Istanbul
Vera Lucia Scythia
Venice
Nubu Kasheli
Alexandria
Theresa
Hamburg
Daisy
London
Astrid
Stockholm
Kanam Agarwal
Calicut
Clara Monica
Seville
Margarita
Amsterdam
Priya
Athens
Andrea
Veracruz
Emin
Muscat
Shalin
St. George
Latia
Malacca