I'm going to assume based on your previous posts that you mean Indiana
I was around my boyfriend's fraternity a lot during their fall and spring rushes, and saw what events worked well and what events sort of flopped. I'd personally recommend a wings/sports night (set up a bunch of TVs showing college football, baseball, NFL preseason...but who cares about that, have wings and chips/dip, taco salad, etc.), poker or casino night, video game night (host a bunch of tournaments in Halo, COD, Madden, old school Mario Kart, etc.), host a cookout and have cornhole boards/volleyball/football/catch set up.
Just make sure your brothers are focused on recruiting and not just hanging out, as you want these guys to both connect with you and remember you. It's not always the coolest parties or the best event that gets guys from your rival, it's about the connections they made with other guys
First. Finest. Forever. <>ALPHA DELTA PI <>
My <3 belongs to a Sigma Alpha Epsilon