Rixx was a location on Betazed that was home of the Sacred Chalice of Rixx, an heirloom held by Ambassador Lwaxana Troi. (TNG: "Haven")

Rixx was a location that served as the home of the Pleasure Goddess of Rixx in the holosuite series that includes: "A Picnic with the Pleasure Goddess of Rixx", "A Visit with the Pleasure Goddess of Rixx". (DS9: "The Homecoming", "Little Green Men")