Step 1 : Introduction to the question "3. Later that night my friend Jack calls and invites me to a party. I say I have two friends staying with me and ask if they can come along. He asks, "Are they Sheilas?" What is he asking?"
...1. Are they good looking? 2. Are they single? 3. Do they drink? 4. Are they female? Again, it's not certain where this came from. However it is known that this was used in Ireland long before it made its way to Aussie shores. Sheilas are girls and blokes are guys.