"I was wondering if it is a cyberism used in the Yahoo channel that Free Women are expected to serve when no slaves are available, or is this also stated in the books?"
Hello,
Yes, this is a "cyberism". Free women did not frequent paga taverns on Gor.
If they went at all, it was usually with an escort. As for a free woman
actually getting up and serving in a paga tavern would be unheard of as she
would be immediately thought of as slave material.