When you join VSA at VCU, you are put into one of four houses: Tortoise, Dragon, Phoenix or Unicorn. Once you're in a house, you are thus given a family. There are around a dozen within each house.
Houses exist to create a sense of competition and pride within the members. Each year, there are competitions such as: Capture the Flag, Dodgeball, and other activities. If you are a member, you will compete not only for your house, but for your family.