Hartla was a dabo girl at Quark's Bar on Terok Nor during the Cardassian Occupation of Bajor. She was still working there as of 2370. One of her special clients was a Cardassian officer named Boheeka.
When Quark contacted Boheeka about a clandestine deal he wished to make, Boheeka reminisced about Hartla, missing her but observing that she would have bankrupted him had the occupation lasted longer. (DS9: "The Wire")