Rdio is an online social jukebox, and the Chrome app allows you to join the party with a sleek app interface. Join Rdio and get a two-week trial of ad-free and offline listening. After that, you'll need to sign up for a monthly subscription to Rdio Unlimited — which costs $9.99 on its website or $14.99 through in-app purchase (a premium price for the same service due to Google's Chrome Web Store surcharge). The app features millions of songs to listen to, and you can follow your friends or people with similar musical tastes. Make Work or Friday Night playlists, and give your friends input on what music they should include on their playlists.