Which congregations have the most successful Youth Groups?

I am interested in the LCMS higher things group which aims to keep the youth liturgically focused. Is their a similar emphasis for the WELS youth?

Maybe there is a "success" scale beginning at zero with UNsuccessful. A congregation that has high school age youth but none attend youth functions is UNsuccessful.

Perhaps if two or more youths gather together occasionally in His name, then the program is successful.

Attributes of MORE successful might include:
-- Is self-sustaining, year after year.
-- Conducts self-initiated, self-governing (youth-directed), Christ-centered activities regularly.
-- Nurtures future church members & leaders.
-- Has inclusive membership (prep school, ALHS, & public school members)

Can you define what you mean by "successful?

Which congregations have the most successful Youth Groups?