Les amis de Alembic 53 'VO
You haven't got any friends yet. When you visit the profile of people you know, you can add them to your friends list (the link is at the top, next to the nickname).
Once they are your friends, you'll be able to know if they are playing at the same time as you and in which category (it will be displayed on this page).
You will also have the possibility to only display your friends in the ranking list during the game (you can do this by going to the options tab in the bottom left box on the game page).