Molly,
If you don't want to alienate your non-Greek friends, then you won't. However, they may alienate themselvs from you - be prepared for that. However, this is a great opportunity to 'prove' to them that Greek life is positive and non all-encompassing.
Refer to this similar post - you should find the answers you seek:
http://www.greekchat.com/forums/ubb/...ML/000439.html
Barbara
Rush Forum Moderator