Last semester after formal recruitment, I divided up rush drop-outs and girls who did not receive bids and had the girls in the chapter who had spoken to them during formal recruitment contact them and invite them to events. This didn't work well at all, partly because a lot of the girls simply weren't interested after their various rush experiences, and partly because our sisters felt very awkward about contacting girls they had only met during rush. I planned events but they were simply not attended.
I agree that doing invitations for fall recruitment events is a great idea, my problem is getting names of girls to invite. Our chapter keeps a running wish list of girls we are interested in; however, getting our current members to contribute to it is difficult. Maybe what I need are suggestions on how to improve upon that. Off the top of my head, I can think of 5 girls who I would LOVE to invite to events next semester and see join our chapter, but for some reason, other girls in our chapter seem to have trouble doing the same. When I set requirements that people must provide x number of names, I still don't get a response. When I just ask at a chapter meeting, I really don't get a response there either.
Thanks for the help.

I'm open to any ideas you might have!