Yeah you always seem to get the "few" that are totally set on one house -- fine by us. Makes it easier to pare the list down (and I do have to grin when they get cut by everyone -- they shouldn't be closed minded!)
We had one girl come dressed HEAD-to-TOE in the colors of another house. She was SO going to be an XYZ -- then after the second night (our philanthropy night) she had a total change of heart and we knew we had her

So now she's able to tell people that they shouldn't assume they are going XYZ because things can change during recruitment.
We also had a legacy come through who was such a B&*@# -- she paraded through the rooms and was telling everyone what this was and that was (meaning - "Oh, this is the badge, I'm going to get my sisters", etc.) in front of all the other PNM's. It was really disgusting to watch. I knew she was just excited, but we had a serious debate on whether or not to pledge her (we have small chapters - not the big ones that have to cut some legacies). The girl made a complete butt of herself during our parties. It was obnoxious. She should've just gone through informal. But we did pick her up in the end...and no, things didn't change.
As for the side topic of this thread -- I don't get the "Jewish house" thing. I can promise you all that AXO is totally 100% non-religious in any way, shape, or form. That is clearly stated before and during ritual and in our by-laws. One of my pledge sisters was Jewish, and we've had plenty of others in both the chapters I've worked with too. I just don't understand how people would "know" what religious affiliation a group has in their ritual.