Just because you’re joining a sorority doesn’t mean you have to change who you are – if you find the right organization for you, they won’t care either way, they’ll just be excited to have an amazing new addition to their chapter. I don’t really do any of the things you mention (I drink, but nothing more than a glass of something with dinner; I don’t smoke anything at all; and I have 8am classes, so no staying out late for me!), and I still get along and hang out with all of my sisters. And there are a lot more of us who share the same values than you think!

Going through recruitment doesn’t mean you have to go Greek, so give it a shot! I hope everything goes well for you.