Another way to get more sisters without paying

When you click on fight, you can scroll down the list of names and click on any name to go to her sorority page.  Then type her a message on her white board and a pop up will appear in your notifications that you sent her a message.  Click on her name in the notification and you will go to her FB page to invite her to be a friend.  Be sure to vote for her while you on her sorority page...