informal rush?

So I dropped out of rushing for a sorority after the first night during formal rush because I was worried and stressed about school and the entire formality of the event and the time commitment of formal rush seemed like too much for the first few days of class for me. A few days after I dropped out, I started to regret not going through and finishing rush - especially since I can hear all the sorority girls and PNM's behind my apartment for bid day.

I am very interested in going through with informal rush during spring or winter quarter. Does anyone have any insight or tips for informal rush and does anyone know what sororities do informal rush and how to get involved with it/how it works?

Thank you!

(ps- I'm mostly interested on what sororities have done informal rush in the past years)