Kaybin District

From Memory Alpha, the free Star Trek reference

The Kaybin District is an area on Denobula known for its nightclubs, sometimes called "Kaybin bars", where during the Denobulan mating season one may find intimate companion(s) in a short time.

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")