Two Klingon sims explored. One a smallish city, the other the surface of a planet over two sims (private islands).
House of JilQuan
Location information: "Klingon empire, homeworld, Ship and defense station sim's. Star Trek sim of The Nimoy group. Includes Great hall, Bar, Landing building, science block Orion Dance are next door and much more."
Klingon Empire of Nedra
Multi-sim location. Didn't see anyone there. Neat build, though.