If the Event manager has chose to allow Friends & Family to be added to the Roster, you can add your Friends & Family by following the steps below: 
1. After you have signed up for the event, Click the Add Friends & Family Link on the right.
 2. Select the Friend or Family member you would like to add to the roster
If the Friend or Family member is not listed, Click the Create a new Friend or Family tab to add a new one.
3. Click Add to Roster or Save & Add to Roster as appropriate.