Newsletter
The first mention asks for leaders, with the commitment stated in weeks and hours, and names the sign-up opening date. The second mention opens the sign-up with the number of groups, the days they meet and the areas. The last call is the sign-up count and the cutoff, with the first meeting week stated.
Social
Save the date is the sign-up opening date and the number of groups. The reminder post the Friday before launch Sunday is the sign-up link and the cutoff. The day-of post is from the launch Sunday with the sign-up table's location and the cutoff.
Sunday Announcements
Announce it two Sundays before with the sign-up open and the group count. The final announcement on launch Sunday is the sign-up table's location, the cutoff and the first meeting week.
Website
The list: every group with its day, time, area, leader and what it is for, and the sign-up form that puts a person into one. Published four weeks out with the leader form on it, then the group list as groups are confirmed.
Print
A sign-up card in the seat backs and a table at the main entrance with the group list on a board. Due a week before launch Sunday.