So you go to a conservative Southern Baptist church. Most likely the kids you are talking to place God pretty high up there on the priority list. Maybe mention that many GLO's are founded upon Christian ideals (loyalty, love, helping one's fellow man, truth, etc), and that joining a GLO should in no way compromise their Christian beliefs. Also mention that many chapters have a weekly Bible study, and that chaplain may be a leadership position that some of these kids may want to pursue. And of course, tell them all that great stuff everyone else already mentioned!
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"Seek the noblest."
Zeta Love! <3