Upenn Frats and Rushing Process

<p>Hey all, I'm a freshman and am looking forward to rushing in the spring. However, because of my classes I wasn't able to get out much during the semester and haven't met that many brothers in frats. Is it true that most frats already have thier entire pledge class picked out before spring rush, or does someone still have a chance at getting a bid even if they are meeting the brothers for the first time in the spring? And how many days is open rush usually? Finally, can anyone say what they know about the FIJI, Sig Ep and Pi Kapp frats</p>