Told you, church related group activities. There's tons of christian based stuff, you just start searching. Bible study, youth groups, volunteer stuff, Christian retreats.
Don't tell me pagans do stuff that Christians don't? Our whole spirituality revolves around group activities if you want to be involved in that aspect (some people choose to be solitares). Our rituals are communal, we eat communally after ritual. Then we periodically get together and do retreats, sweat lodges, educational weekends, etc.