On the ROBLOX Website, you are allowed to create a party or join parties that allow you to communicate with multiple users, similar to the chat feature. When the leader of the party joins a server, everybody in the party are forced to join as well.
Party Example - Not at a game

Example of a regular party.

Party Example - At a game

Example of when a game is being played.

In 2015, this feature was overhauled and is no longer available to people not on your friends list.

Creating a party

Creating a party is a simple process.

  1. Open up the 'Chat' button.
  2. Click create chat group (invite someone) then click the game controller button to turn it into a party
  3. Then click on the Gear to view party settings.
  4. Join a game and everyone will automatically follow you.