Bob Robbing a Bank

Paul

Introduction
You are Bob. You want to rob a bank. Bob is actually really rich his parents where millionaires. His mom was a fashion desighner and and his dad was a former president of america and has his own TV show. You want to rob the bank for fun. You see, working is boring so why not rob the bank? You done several robberies in banks and museums like ROM. You escaped prison 2 times before.It was fun.
It is the Royal Bank of Montreal. It is 2:00 am. There are five rooms. Three of them are locked. So you can't go in. What unlocked room should I go into?
The staff room
The security room