Can anyone give me a list of colleges or universities that allow Co-Ed dorm rooms?
I’m not sure if there’s any such list. Many colleges start out with single-gender dorm rooms, but will make exceptions on a case-by-case basis, depending on what your reasons are. As an example, at my school all freshmen are, by default, in doubles with a roommate of the same-gender, on mixed-gender floors. However, you can request gender-neutral housing, in which case Res Life will contact you to determine what your needs are.
I would suggest looking at schools based on criteria that are easier to measure (location, size, majors, etc) and then screening them by what their housing policies are. Just because that might be a bit easier.