A reader pointed this out in the recent comments section on Juventutem: FOEDERATIO INTERNATIONALIS JUVENTUTEM
It looks like this group is doing precisely what I had hoped; moving Juventutem beyond the simple confines of WYD and into day to day Catholic life. Beautiful. Might I encourage young readers to start their own chapters, or older readers to encourage their youth to do so?
The site also includes some good links to some European Catholic youth initiatives attached to the Roman liturgical tradition. (Which I've since added to the NLM links as well. In fact, there are enough of them now that I've had to subdivide it into its own "Classical Rite Youth Movements" category. What a joyful thing.)
From that website:
How can I join?
Email us or send us a letter mentioning your surname, Christian name, date of birth, full address and email address and stating that you wish to join the FIJ. Any other information is welcome!
Membership Committments
1. recite daily the extract from Psalm 42 «Judica Me », (“Judge me o Lord” - see below) or say a prayer of your choosing (Hail Mary or Our Father for instance);
2. enter into a church or oratory once a week to adore Our Lord really present in the tabernacle;
3. once a year or more: attend Holy Mass in the 1962 Roman rite; go to Confession; on behalf of Juventutem, partake in some faith activity (Holy Hour, doctrinal talk, pro-life initiative, charitable action, excursion, etc).
What age should FIJ members be?
A 16 to 36 span seems reasonable to be able to get involved in "youth" activities.
Can married or elderly or consecrated persons partake in some way?
The sort of "youth" we are concerned with is not essentially a matter of age, but rather of respectful familiarity with God's grace. As a consequence, the categories of persons mentioned above are most welcome to join the FIJ as supporters, through prayer and/or through material help. Whatever our age indeed, we all want to pray for holy youths, tomorrow's adults
How does a Juventutem group start?
If three persons or more in the same location (parish, city, region) have discussed their common interest for Juventutem, and have started praying together for Holy Rosary, or at Holy Mass, they can contact us to be affiliated as a Juventutem group. They would be encouraged to speak with their local priest (pious and doctrinally sound) asking whether they could commit as Juventutem members for Holy Hour or for works of charity. They should also ask him for doctrinal formation. Other activities (e.g. sports, music, travels) are also encouraged to strengthen friendship among the members