Sooooo...once upon a time, there was a guy who was thinking about rushing at his university. His best friend opted not to but Tall Son had many Greek relatives, including 6 older sisters

and several uncles and cousins. A call from his great uncle finally convinced him that this was the thing to do!
At his university, there are many fraternities. We thought he'd be all about the big ones--frankly, he was a big fish in a big pond in high school and we thought he might prefer numbers.
For the first several days of recruitment, the men went up and down Greek Row for open houses. They could drop in wherever they wanted and visit. After open houses were over, they would receive invitations to preferential parties.