Okay, I'm of course a bit biased here considering that I am a DZ... But I really do think that you should check them out.
I'm so glad that you decided to meet with them today! And please don't let one girl in the chapter stand in the way of pledging DZ if that's what you really would like to do. At my school, the ratio of girls to guys was 12:1 when I was there, so there was always someone in my chapter who was dating the ex of another sister. It was bound to happen, and the girls just dealt with it. I think that your situation is very similar and I really don't feel like it will be a big issue to the girls.
Please let me know how your meeting goes! Good luck!
