Relationships between leaders and kids struggle to be built.
Considering the one-off event is just that, an event for one night, it is a struggle for youth leaders to build relationships with kids. There is only 2-3 hours where the kids and leaders are mixing, if they actually do, and at the end they kid has gone. Obviously there needs to be proper follow-up afterward and also the gathering of contact information for other things.
But again, on the night there is not much relationship building. It is most likely that all the youth leaders are busy involved in the night, whether that be on music, sound, running games, looking after the food etc. It is hard to have enough leaders to do that let alone have people sitting around and talking to the kids. Which, i might add, is probably the most important thing you can do, rather than checking whether there are enough cans of coke for everyone.
So, on the night it becomes a struggle to chat to kids and build relationships. They are having a great time, no doubt about that, but where is the investment in the lives of the young people? Where is the growing in faith and discipleship coming from if there is no relationship with the youth leader?