Find someone in the student counsel, seminary counsel, or just reach out to a group that you might not know very well. Does the girl you're thinking about asking have a group she could get you guys into? Stretch yourself a little bit outside of your comfort zone. Some of my best dates in high school were when I was with groups I didn't usually hang out with. Sometimes its a blast, other times its super cringe, either way it's memorable and you can laugh about it later.