Unfortunately, Shipyard was under construction when I arrived, so I do not know anything about it. Does have some good skins, though (Vulcan, Klingon, Human, Romulan, etc.).
You arrive at a space-station, the shipyard, hovering near a moon.
Look for: "Shipyard" in search.
United Federation Starfleet:
The United Federation Starfleet sim was an interesting build - towers to rent a room in, the main Star Fleet tower, and areas to shop. I saw some people standing around, a few, but little in the way of role-play.
When you arrive, you "beam" into the main tower:
Look for: "United Federation Starfleet" in search.