How to install Spotify

Spotify has a work-in-progress client for 64-bit Ubuntu. Installing it takes some commands:

$ sudo sh -c 'echo "deb http://repository.spotify.com/ stable non-free" > /etc/apt/sources.list.d/spotify.list'
$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 94558F59
$ sudo apt-get update
$ sudo apt-get install spotify-client

Tried with: Spotify 0.9.10.17 and Ubuntu 14.04