Want to play with the friends you've added? Here's how to do this:
1. Log into your account.
2. Through your lair, select Friends in the lower-right hand corner.
3. In the left-hand panel, check to see which are your friends are online. They will have a green mark stating they are In game, and will have a play option. Select Play with the friend you want to play and you will immediately be dropped in your friend's area.