If you are attending as a group, you may want one person to manage all of your seating. To help this process, you can set one person to be the seating manager for your group. 

To set your seating manager, go to the event in My Bookings and select "None" by Seat Manager

You can then select someone in your group to be your Seating Manager. Note that they will need to have the same clan tag as you to be selected.

Once you have picked the Seat Manager they will show on your booking.