It's fun sharing music with people, especially while you're doing other fun things. If you use Discord to chat with your gaming friends (or anyone really), now you can listen to music as a group with built-in Spotify connectivity.
Discord is a newcomer to the chat scene, but it's made a big splash. The app provides voice and text chat for groups, with an emphasis on gaming. However, it's so sweet that I've already started using it for everyday chat.