Have a male, herm, futa, or similar character who would go to a gangbang in a hotel room that they saw advertised somewhere online by the female who'll be in the middle?
Follow the link below for more details (and to sign up to possibly join in on her... )

(I wasn't sure which link was better to use so I put both in.)
https://www.furaffinity.net/journal/3455031/
https://www.furaffinity.net/view/7969952/