There is a difference—more than a subtle difference—between "call" girls and "party" girls, as previously set out.
Those in the first category go through all the earlier motions—and the later ones, too. But the party girls are just what their name implies.
They'll dine and dance with you, court and even romance with you. But they aren't prostitutes, if that's what you're looking for, and when it's time to go home, they go to their own home, unless you've clicked hard and registered high appeal.
Many of these gals are models or show gals trying to earn a few extra bucks, honestly.
Some of the call girls are also models or chorines, but their extra few bucks aren't earned so honestly, by pious standards.
FOOTNOTES:
[1] INSIDE STUFF: If the gal you're calling isn't home, ask the operator at the woman's hotel if any others said they're lonesome. They frequently confide in the "Hello Girl."