Spotify desktop users have had the ability to enable private listening for about a month now. Spotify just recently updated its Android app to include the feature for Android users as well. Here's how to enable it:
Step 1: Go to the Android Market and update your Spotify app.
Step 2: Launch the Spotify for Android app, then in the lower right-hand corner, tap on "More," then "Settings."
Step 3: Check the box next to "Private Session."
Step 4: When you go back to your playlists, you'll see the "Private Session&… Read more