I run the Roll20-Only Text Games Club for playing text-only using only the Roll20 website (no external sites within the club). The club does not exclude players who do other things outside the club.
I run the Burning Wheel Workshop, a separate game to learn Burning Wheel. Players can use the game room any time but I post my "office hours" in the forum. The official game date and time are just markers.
I have a Roll20Con game called New Players Dive Into the Retro Deep End, which is a learn-by-doing session for total newbs using the retro AD&D 2nd Edition system. No prior knowledge is needed, and you don't need to have the books.
I'm GMing Random Adventures, a D&D 5E game for four players that will have its third session on Sunday, June 18, 2017, at 3 pm EDT. The game is for four players. If it isn't listed then it's full.
I'm GMing Champions of Her Bounty, an AD&D 2E adventure set in the Neo-Medieval fantasy future of Greenland long after climate change has made us extinct and new races have evolved. It's publicly listed.
I'm also a member of Knights of the Written Word 2, a gathering place for discussion and play of text-only games, including those that use external sites.
I enjoy playing and GMing D&D 5E, AD&D 2E, and Call of Cthulhu, but Burning Wheel is destined to be my favourite once I've mastered it. I want to try the Simple Fantasy System and perhaps Pathfinder. I don't use voice/video or external sites when playing on Roll20, but have no problem with other people doing it in non-club games.