OK I think this is the answer so if you are still working on it dont read it..
Got it. Here is my question that I can ask anybody to determine which side of town I am in, along with my handy dandy explanation of why:
"Do you live in the side of town that we are in right now?"
If you are in the east side of town:
and you happen to ask a truth telling east sider, he will answer "Yes"
and you happen to ask a lying SOB west sider, he will answer "Yes"
if you are in the west side of town:
and you happen to ask a truth telling east sider, he will answer "No"
and you happen to ask a lying SOB west sider, he will answer "No"
Therefore, regardless of who you ask, a yes answer to this question means you are currently in the East side of Supraville, and a no answer to this question means you are currently in the West side of town.
Do I win??????? and where is this Supraville?