Grouping System

The Grouping System is a feature that was released on 1 September 2014 and replaced the Activity Stream in the Community interface. The Group System allows players to organise events that involve boss fights, skills, and minigames with other players on all worlds. Players can create groups within the system and use a separate chat tab for communication with those in the same activity and those specific to the team at hand.

Functionality
After queueing to find a group, you will be assigned a group at random. After selecting ready, the grouping system will offer you the ability to quick hop worlds. The world is dependent upon the current group leader.

When someone logs out or the group leader leaves the group, the system will assign a new group leader at random. If the current group leader logs out for 1 minute or more, the system will automatically flag the user and transfer leader to one of the currently active players.

Trivia

 * Although functional in F2P, free players are not able to join each other in public groups (this includes both 'Join Queue' and 'Random Group'). It is not known if this is a bug that has been overlooked by Jagex or an intentional limitation.  This problem has been present since release.
 * It's occasionally used in lures, so players should be wary of joining random groups.