So I recently stayed at Pop Century and I know this is going to sound down right bizarre. We arrived late to the resort and were driving a rental car. I was giving a room in the 80's section and when I opened the door to our room there were suitcases on the bed. I exited the room and called the front desk who assured me that they probably delivered someone's suitcase to the wrong room and they would be down to get them. So I reopened the door, this time turning the lights on and saw a cooler, gift bags, etc. and it was very obvious that there was someone staying in the room. I called again and was assured that no one was staying in the room but I left the area and went down to the pool area and continued talking to the staff who wanted me to stay at the room so they could come get my luggage and move me to a different room. I looked up from the table by the pool just in time to see the tenants of that hotel room return and not be able to get inside as their magic bands were now deactivated. So long story short, and I know it sounds odd, BUT KNOCK FIRST. I would say I avoided a possibly dangerous situation when I was opening the door to that occupied hotel room at 11:30 pm and never would have thought to knock on the door just in case. Just thought I would share