Oh man, we did this (MVP style) about 6 years ago, called it Collabo. Tested it with a Facebook group, then we manually connected random people together and scheduled them video chats. We called it "the water cooler for solopreneurs." Really just a fun experiment more than a business. Happy to share whatever learnings I can dig up.

Edit: Just found the homepage mock. "A first-of-its-kind virtual water cooler for freelancers and solopreneurs." It was invite only, too. At least at the start.