Until I finish my story telling tools, there is a web forum where people play RPG games, and I practice my DM skills there. It is not as popular as it was, but it's still online as of 09.09.2017.
http://frpg.su/
If you register, you get to see a really cool ".gif" menu here.
And every location is it's own topic, there are a few investigations.
It's in Russian though.