Has a welcome wagon been considered? When a new member joins and it is feasible and the person is okay with it maybe three or so members could go meet the new person to welcome them. A face to face interaction makes a pretty big impression and it lets them know the club is real and members are active. It also tells the new person they are valued by the club because members took time out of their own lives to go say hello in person. We could also give the new person some donated frags from club members and some swag with the club logo on it like the stickers or something.