When you log in, you are put in the lobby. The lobby allows you to see what world friends are online, as well as join a clan chat. You can also private message friends, as well as review new features. It also lets you set graphics settings, sound settings and account information. It was proven useful during Bonus XP Weekend because it allows players to hang out while waiting for trees to grow, awaiting offer completion through the Grand Exchange or for Dungeoneering team mates to log in without losing XP multiplier.