The Tabletop RPG One Shot group on Facebook is hands down the best place to go in order to find games to play in online. Within hours of posting what you are looking to run or play you will probably have a full group. This group has only been around a few months and is near the 500 member mark. The group could hit 600 members by the end of the year and as more people grow comfortable running online games it will only continue to grow.
Right now there are more than 8 games scheduled to be played in the near future. Some people have campaigns running because of the Tabletop RPG One Shot group. I have ran two Dungeons and Dragons Fifth Edition games so far. I've played in at least three Dungeons and Dragons Fifth Edition games, Call of Cthulhu d20, Ninjas and Superspies, and a Heroes Unlimited game.
I am scheduled to run a Heroes Unlimited game and may run some D&D games soon. I am supposed to play in in a Heroes Unlimited game coming up soon as well. Really hoping someone runs Mutants and Masterminds soon because that is a game I have been curious about for awhile. The Dragon Age game might be fun to try out in the near future and I hear that someone may run it soon.
The amount of friends I have made from the group has been amazing! Everyone there has been great and there hasn't been any drama. Everyone is on the same page about being there to play games and just have some fun. Never before have I been part of a community that was so nice and appreciative of each other.
Looking forward to seeing how the group grows and the types of games that get ran there. Don't be afraid to try and play or run a niche game because there are a lot of people who always want to try something new. The group formed out of people wanting to try new games. You can play the same game over and over again or try that game on your shelf that your home group refuses to play. That is the true beauty of the One Shot Group. It is there for everyone and their interests!