"On the new player table, a smart organizer will "stack the deck" by including a seasoned player at the table to help others learn. This helps the GM focus on the game and running the table while ensuring the player has questions answered in a timely manner. A smart GM uses the seasoned player to give the new player a little attention. A peer who knows the ropes in the game is helpful to everyone and keeps the table moving...
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This is usually what I do and encourage the GMs to do as well, it allows them to focus on the storytelling.