Sorry to crash your board.
My stepdad pledged SigEp when he was in college, and they were always referred to as "Red Doors" because he said all the SigEp houses had front doors painted red. I went out with a SigEp once, though (same chapter as my stepdad pledged about 40 years ago), and he thought I was nuts when I asked why the new house they built didn't have a red door...do you all not do that anymore?