"Meet Your Sorority House" has a requirement of 1 energy and 1 sister, and rewards players with $200 cash and +2 influence. Once you go to the jobs page and click "Do Event", you'll be taken to a screen that shows you a list of all your friends who are playing Sorority Life but are not yet your sisters. You can then connect with them, and invite new people to the game. This job is unlocked right away when you start playing, so it's clear that Playdom are trying to get more players to their game.
Have you met your sorority sisters yet?