Welcoming visitors to your group
When someone new comes to one of your meetings, it is very important that they are made to feel welcome. Go over to them, greet them, maybe give them a hearty 'Saluton!' You'll need to inquire as to their proficiency before launching into full blown Esperanto.
Introduce them to the other members, and maybe pair them up with a 'buddy' for the meeting. Connections to others are important to newcomers, otherwise they may assume it's a closed group and never return.