[Stef the Pef]

Talk to the professor AND the office of Greek life.

You never know--if you approach it correctly and make it to all the other classes or a make-up session, you might be able to miss class. If it's a big class that's offered at more than one time, your prof might even let you catch a different time of the same class to make it up.

On the other hand, talking to the office of Greek life could excuse you from the rush event, too. They know you're here to go to class first. Let them know you're still interested in that fraternity and go from there. If your school allows it, maybe catch a few members of that group and let them know yourself that you're still interested in rushing them, but can't make it to the event because of class.

Thing is, you have to TALK to people at your university first. They'd be able to help you out--not GC.

Good luck!