This is a good question and something I struggled with when I was in school. My suggestion is to stand strong in your faith and not let anyone pressure you to do something different.
I now work for an organization called Greek InterVarsity and we work with students who are Christians and are Greek. There are ways you can share your faith in your house and not be pushy. I think we can all agree we never want to be preached at or talked down to because of things we are doing. The best thing you can do is love others in your house...that's what we are called to do!
We've got lots of resources on our website that might help you. You can check them out at
www.greekiv.org. We will be launching info on our Greek Conferences later this week (aiming for Thursday)....make sure you look into that. We'll be hosting conferences in L.A., Indianapolis and Charlotte, N.C. Maybe you can make one!
Be encouraged as your being challenged. Stand strong and love those in your house!