Re: rushing a few frats?
"Rush" is the period when (usually new) college students get to know the fraternities and sororities on campus. At the end of this period, students may get "bids" to join these organizations. If you accept your bid, you become a "pledge." At the end of your pledging period, you are "initiated" and then you are a "brother" or "sister" of that fraternity or sorority, which is also called a "house."
It can be a verb. I'm rushing a few fraternities -- I'm interested in learning more about them and maybe becoming a member. It works both ways: The fraternity can say "We're rushing Alan and Richard pretty hard because we think they'd be great brothers for our house."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.