Our fixed lab is a private lab working in the Phoenix area for the last 20 years, and they've moved their entire lab into our clinic building--so they're really easy to work with. Every other month we do a two day rotation in the fixed lab, where we practice waxing, watch them do procera crowns, invest gold crowns, learn more about shade matching, etc.
Our removable lab is not on-site.
We can do next to nothing if we wish. Example: for dentures, take a facebow, bite registration, and max. and mand. PVS impressions. Send that to the lab to be poured, mounted, articulated, and have lab set teeth in wax. I've done that. But to contrast that, I've also set teeth in wax and the whole shebang for dentures.
At Arizona we can do as much labwork as we wish, or as little as we wish.