The Kaybin District was an area on Denobula known for its nightclubs, sometimes called "Kaybin bars", where during the Denobulan mating season one could find intimate companion(s).

In 2151, Doctor Phlox recommended the riverside Kaybin bars in a letter to his Interspecies Medical Exchange colleague Dr. Jeremy Lucas on Denobula. (ENT: "Dear Doctor")

In 2153, Phlox mentioned Lucas' experiences in the Kaybin District in another letter, when talking about his occasional loneliness on Enterprise and his desire to be with other Denobulans again. (ENT: "Doctor's Orders")