IrisVR is marketing a VR design product called Prospect, which is a building industry design tool which supports multiuser meetings:
Intended for the architecture, engineering and construction trades, Prospect offers full automatic conversion from Nacisworks, SketchUp, Revit, Rhino, FBX, OBJ and other 3D content creation formats and tools. You can then share your imported work with others:
Walk through your 3D files with colleagues in VR, no matter their location. Multiuser provides reliable voice chat and a shared virtual environment for presentations and design reviews.
Prospect supports Oculus Rift, Oculus Quest, HTC Vive, and Windows Mixed Reality headsets. You can follow IrisVR on social media: Facebook, Twitter, Instagram, LinkedIn, and YouTube.
And (of course), I have added it to my ever-growing list of social VR/virtual worlds.