Best playlist-based music app?

I'm pretty happy with the default Music app when I'm listening by myself, but when I'm listening with others—in the car or on my family's living room speakers—I like the ability to make quick, temporary playlists. For this reason, I've used Panamp for a long time, and while its swiping mechanic is great, the app is a little clunky and hasn't been updated for iOS 7. Can anyone recommend an up-to-date app that builds quick playlists in a similar way?

Thanks!