We've looked for this before and recently found a website that allows you to play music with a community of other people. It's called Plug.DJ and we made an official one for Finding Herobrine. We've been adding a lot of different songs. We aimed for clean songs/videos.
You have to make an account first but it's fun. :) There's a chat and if you would rather not be in the chat, you can turn it off for certain messages.
With this, there are a few rules to keep the community in order (rules are always subject to change):
1. No spamming or inappropriate language in the chat.
2. No asking for a song skip. The song will be skipped if there are more Mehs than Woots.
3. No asking for any staff positions in the community.
4. You can suggest songs to be added to the playlists in the Finding Herobrine forums if that song is not already added. Linking a youtube video makes adding the song much simpler.
5. You can vote in the chat for a certain genre or type of playlist when a staff asks.
See you on there! :)
-BubblezwithaZ and the FH Staff