Events in Cryptovoxels are a really fun way to get a group of people together and hang out.
Even if you don't own (or are a collaborator to) parcels, you can still meet up with friends and travel together. If you want to broadcast music to each other, all you have to do is find a boombox, and you can cast music to your friend.
Boomboxes are speakers that anyone can broadcast to. Click on a boombox to open this menu
Select the drop down to broadcast from your microphone, or you can use something like loopback or jackaudio to route your audio to this list of input devices.
The easiest way to stream is to use desktop / tab audio capture in chrome (make sure you click the 'share audio button' when choosing a tab). Launch a youtube tab, then you can stream music from youtube to your group.