BrothelLife

Basic definition of Courtesan I’ve come across is an upscale prostitute which I believe fits the Ladies of the houses well.
I refer to these Ladies as Ladies or Courtesans. Whor, Hooker & prostitute All present negative images in the mind. Working girl I don’t find offensive & have used occasionally but feel that covers both Legal in house Ladies & illegal escorts thus the term Courtesan would specifically designate legal Ladies from escorts would Distinguish & identify them better Hopefully giving them more respect & social acceptance

I like the term "provider" as it simply refers to a provider of some kind of service. You can keep "LPIN" also.

"Courtesan" is good too, especially from the standpoint of being respectful.