Lemme think...the Spanish Department, where I am now, would really play up a fiesta theme with a lot of singing, dancing, and spicy food.
The horticulture department, where I got 3 degrees, would've had the prettiest rush room because we would've decorated it heavily with our homegrown flowers. And if we were rushing at the U of Hawaii, I just know we would've had huge bowls of our departmentally grown macadamia nuts for the rushees!
Without question, our dirty rush would've involved running down the guys in the Animal Science Department.