A couple years back I was in Reno. The wireless is free, but the ethernet costs $20 or something. But I didn't realize that. I couldn't get the wireless to work very well so I connected to the ethernet. Since I didn't know about the additional charge, it was billed to the room. I got an email a few days later from travel audit about the expense. Explained the situation. I just had to get a receipt and submitted it.