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
-Or-
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.