With my daughter's friends, I just told them what it was like and compared it to activities they did in high school (mainly Girl Scouts and Marching Band). I didn't push, but told them if they had questions to feel free to ask. The ones who seemed the most interested, who I wrote recs for, didn't go through recruitment. The one who seemed most wary did and is an Alpha Gam
My daughter did go through also and I wasn't sure she was going to. You just never know.